diff --git a/isolate/isolate.py b/isolate/isolate.py
index 3eeb9f0..643ba6b 100644
--- a/isolate/isolate.py
+++ b/isolate/isolate.py
@@ -191,7 +191,8 @@ class Isolate(commands.Cog):
         data = await self.config.guild(guild).ISOLATED()
 
         for mid, mdata in data.copy().items():
-            if not mid.isdigit() or guild.get_member(mid):
+            intid = int(mid)
+            if guild.get_member(intid):
                 continue
 
             elif clean_pending or ((mdata["until"] or 0) < now):
@@ -204,6 +205,7 @@ class Isolate(commands.Cog):
     @isolate.command(name="clean-bans")
     @commands.guild_only()
     @checks.mod()
+    @checks.bot_has_permissions(ban_members=True)
     async def isolate_clean_bans(self, ctx):
         """
         Removes banned members from the isolated list.
@@ -213,18 +215,15 @@ class Isolate(commands.Cog):
         guild = ctx.guild
         data = await self.config.guild(guild).ISOLATED()
 
-        try:
-            bans = await guild.bans()
-            ban_ids = {u.id for u in bans}
-        except discord.errors.Forbidden:
-            await ctx.send(warning("I need ban permissions to see the list of banned users."))
-            return
+        bans = await guild.bans()
+        ban_ids = {ban.user.id for ban in bans}
 
         for mid, mdata in data.copy().items():
-            if not mid.isdigit() or guild.get_member(mid):
+            intid = int(mid)
+            if guild.get_member(intid):
                 continue
 
-            elif mid in ban_ids:
+            elif intid in ban_ids:
                 del data[mid]
                 count += 1
 
diff --git a/markov/markov.py b/markov/markov.py
index 97ea798..c686070 100644
--- a/markov/markov.py
+++ b/markov/markov.py
@@ -152,7 +152,7 @@ class Markov(commands.Cog):
             content = content.split(" ")
             try:
                 model[str(message.channel.id)]
-            except:
+            except KeyError:
                 model[str(message.channel.id)] = {}
 
             for i in range(len(content) - 1):
diff --git a/punish/punish.py b/punish/punish.py
index f684812..688d48c 100644
--- a/punish/punish.py
+++ b/punish/punish.py
@@ -190,7 +190,8 @@ class Punish(commands.Cog):
         data = await self.config.guild(guild).PUNISHED()
 
         for mid, mdata in data.copy().items():
-            if not mid.isdigit() or guild.get_member(mid):
+            intid = int(mid)
+            if guild.get_member(intid):
                 continue
 
             elif clean_pending or ((mdata["until"] or 0) < now):
@@ -203,6 +204,7 @@ class Punish(commands.Cog):
     @punish.command(name="clean-bans")
     @commands.guild_only()
     @checks.mod()
+    @checks.bot_has_permissions(ban_members=True)
     async def punish_clean_bans(self, ctx):
         """
         Removes banned members from the punished list.
@@ -212,18 +214,15 @@ class Punish(commands.Cog):
         guild = ctx.guild
         data = await self.config.guild(guild).PUNISHED()
 
-        try:
-            bans = await guild.bans()
-            ban_ids = {u.id for u in bans}
-        except discord.errors.Forbidden:
-            await ctx.send(warning("I need ban permissions to see the list of banned users."))
-            return
+        bans = await guild.bans()
+        ban_ids = {ban.user.id for ban in bans}
 
         for mid, mdata in data.copy().items():
-            if not mid.isdigit() or guild.get_member(mid):
+            intid = int(mid)
+            if guild.get_member(intid):
                 continue
 
-            elif mid in ban_ids:
+            elif intid in ban_ids:
                 del data[mid]
                 count += 1