diff --git a/main.py b/main.py
index d7b79cc..218ab8c 100755
--- a/main.py
+++ b/main.py
@@ -83,12 +83,12 @@ class Irc():
                     log.error('Failed to load plugin %r: the plugin could not be found.', plugin)
                 else:
                     log.error('Failed to load plugin %r: import error %s', plugin, str(e))
-        print("loaded plugins: %s" % self.loaded)
+        log.info("loaded plugins: %s", self.loaded)
 
 if __name__ == '__main__':
-    print('PyLink starting...')
+    log.info('PyLink starting...')
     if conf['login']['password'] == 'changeme':
-        print("You have not set the login details correctly! Exiting...")
+        log.critical("You have not set the login details correctly! Exiting...")
         sys.exit(2)
 
     protoname = conf['server']['protocol']
diff --git a/plugins/commands.py b/plugins/commands.py
index b0b9db3..e55153f 100644
--- a/plugins/commands.py
+++ b/plugins/commands.py
@@ -6,12 +6,13 @@ import logging
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 import utils
 from conf import conf
+from log import log
 
 @utils.add_cmd
 def debug(irc, source, args):
-    print('user index: %s' % irc.users)
-    print('server index: %s' % irc.servers)
-    print('channels index: %s' % irc.channels)
+    log.debug('user index: %s' % irc.users)
+    log.debug('server index: %s' % irc.servers)
+    log.debug('channels index: %s' % irc.channels)
     utils.msg(irc, source, 'Debug info printed to console.')
 
 @utils.add_cmd
diff --git a/plugins/hooks.py b/plugins/hooks.py
index 1312cd2..851a949 100644
--- a/plugins/hooks.py
+++ b/plugins/hooks.py
@@ -2,11 +2,12 @@
 import sys, os
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 import utils
+from log import log
 
 def hook_join(irc, source, command, args):
     channel = args['channel']
     users = args['users']
-    print('%s joined channel %s (JOIN hook caught)' % (users, channel))
+    log.info('%s joined channel %s (JOIN hook caught)' % (users, channel))
 utils.add_hook(hook_join, 'JOIN')
 
 def hook_privmsg(irc, source, command, args):
@@ -14,5 +15,5 @@ def hook_privmsg(irc, source, command, args):
     text = args['text']
     if utils.isChannel(channel) and irc.pseudoclient.nick in text:
         utils.msg(irc, channel, 'hi there!')
-        print('%s said my name on channel %s (PRIVMSG hook caught)' % (source, channel))
+        log.info('%s said my name on channel %s (PRIVMSG hook caught)' % (source, channel))
 utils.add_hook(hook_privmsg, 'PRIVMSG')
diff --git a/protocols/inspircd.py b/protocols/inspircd.py
index c83c57d..d395de2 100644
--- a/protocols/inspircd.py
+++ b/protocols/inspircd.py
@@ -417,11 +417,11 @@ def handle_events(irc, data):
             hook_cmd = command
             if command in hook_map:
                 hook_cmd = hook_map[command]
-            print('Parsed args %r received from %s handler (calling hook %s)' % (parsed_args, command, hook_cmd))
+            log.debug('Parsed args %r received from %s handler (calling hook %s)', parsed_args, command, hook_cmd)
             # Iterate over hooked functions, catching errors accordingly
             for hook_func in utils.command_hooks[hook_cmd]:
                 try:
-                    print('Calling function %s' % hook_func)
+                    log.debug('Calling function %s', hook_func)
                     hook_func(irc, numeric, command, parsed_args)
                 except Exception:
                     # We don't want plugins to crash our servers...
diff --git a/tests/test_proto_common.py b/tests/test_proto_common.py
index e4d6d5d..84a3bf9 100644
--- a/tests/test_proto_common.py
+++ b/tests/test_proto_common.py
@@ -1,6 +1,7 @@
 import sys
 import os
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from log import log
 
 import main
 import classes
@@ -35,12 +36,12 @@ class FakeIRC(main.Irc):
         
     def run(self, data):
         """Queues a message to the fake IRC server."""
-        print('-> ' + data)
+        log.debug('-> ' + data)
         self.proto.handle_events(self, data)
 
     def send(self, data):
         self.messages.append(data)
-        print('<- ' + data)
+        log.debug('<- ' + data)
 
     def takeMsgs(self):
         """Returns a list of messages sent by the protocol module since
diff --git a/utils.py b/utils.py
index 48a05dc..0acf20b 100644
--- a/utils.py
+++ b/utils.py
@@ -2,6 +2,8 @@ import string
 import re
 from collections import defaultdict
 
+from log import log
+
 global bot_commands, command_hooks
 # This should be a mapping of command names to functions
 bot_commands = {}
@@ -98,13 +100,12 @@ def parseModes(irc, target, args):
         return ValueError('No modes supplied in parseModes query: %r' % modes)
     args = args[1:]
     if usermodes:
+        log.debug('Using irc.umodes for this query: %s', irc.umodes)
         supported_modes = irc.umodes 
     else:
+        log.debug('Using irc.cmodes for this query: %s', irc.cmodes)
         supported_modes = irc.cmodes
-    print('supported modes: %s' % supported_modes)
     res = []
-    for x in ('A', 'B', 'C', 'D'):
-        print('%s modes: %s' % (x, supported_modes['*'+x]))
     for mode in modestring:
         if mode in '+-':
             prefix = mode
@@ -112,62 +113,54 @@ def parseModes(irc, target, args):
             arg = None
             if mode in (supported_modes['*A'] + supported_modes['*B']):
                 # Must have parameter.
-                print('%s: Must have parameter.' % mode)
+                log.debug('%s: This mode must have parameter.', mode)
                 arg = args.pop(0)
             elif mode in irc.prefixmodes and not usermodes:
                 # We're setting a prefix mode on someone (e.g. +o user1)
-                print('%s: prefixmode.' % mode)
+                log.debug('%s: This mode is a prefix mode.', mode)
                 arg = args.pop(0)
             elif prefix == '+' and mode in supported_modes['*C']:
                 # Only has parameter when setting.
-                print('%s: Only has parameter when setting.' % mode)
+                log.debug('%s: Only has parameter when setting.', mode)
                 arg = args.pop(0)
             res.append((prefix + mode, arg))
     return res
 
 def applyModes(irc, target, changedmodes):
     usermodes = not isChannel(target)
-    print('usermodes? %s' % usermodes)
+    log.debug('usermodes? %s' % usermodes)
     if usermodes:
         modelist = irc.users[target].modes
     else:
         modelist = irc.channels[target].modes
-    print('Initial modelist: %s' % modelist)
-    print('Changedmodes: %r' % changedmodes)
+    log.debug('(%s) Applying modes %r on %s (initial modelist: %s)', irc.name, changedmodes, target, modelist)
     for mode in changedmodes:
         if not usermodes:
             pmode = ''
             for m in ('owner', 'admin', 'op', 'halfop', 'voice'):
                 if m in irc.cmodes and mode[0][1] == irc.cmodes[m]:
                     pmode = m+'s'
-            print('pmode? %s' % pmode)
             if pmode:
-                print('pmode == True')
-                print(mode)
-                print(irc.channels[target].prefixmodes)
                 pmodelist = irc.channels[target].prefixmodes[pmode]
-                print(pmodelist)
-                print('Initial pmodelist: %s' % pmodelist)
+                log.debug('(%s) Initial prefixmodes list: %s', irc.name, irc.channels[target].prefixmodes)
                 if mode[0][0] == '+':
                     pmodelist.add(mode[1])
-                    print('+')
                 else:
                     pmodelist.discard(mode[1])
-                    print('-')
-                print('Final pmodelist: %s' % pmodelist)
+                log.debug('(%s) Final prefixmodes list: %s', irc.name, irc.channels[target].prefixmodes)
             if mode[0][1] in irc.prefixmodes:
                 # Ignore other prefix modes such as InspIRCd's +Yy
                 continue
         if mode[0][0] == '+':
             # We're adding a mode
             modelist.add(mode)
-            print('Adding mode %r' % str(mode))
+            log.debug('(%s) Adding mode %r on %s', irc.name, mode, target)
         else:
             # We're removing a mode
             mode[0] = mode[0].replace('-', '+')
             modelist.discard(mode)
-            print('Removing mode %r' % str(mode))
-    print('Final modelist: %s' % modelist)
+            log.debug('(%s) Removing mode %r on %s', irc.name, mode, target)
+    log.debug('Final modelist: %s' % modelist)
 
 def joinModes(modes):
     modelist = ''