diff --git a/core.py b/core.py
index d9b67c1..e335bf7 100644
--- a/core.py
+++ b/core.py
@@ -48,11 +48,12 @@ async def on_message(message, edited=False):
 
     try:
         if (cooldowns := command_cooldowns.get(message.author.id)) and not edited:
-            cur_time = time.time()
-            if (end_time := cooldowns.get(matched)) and round(end_time - cur_time) > 0:
+            if (end_time := cooldowns.get(matched)) and (
+                remaining_time := round(end_time - time.time()) > 0
+            ):
                 await utils.reply(
                     message,
-                    f"please wait **{utils.format_duration(round(end_time - cur_time), natural=True)}** before using this command again!",
+                    f"please wait **{utils.format_duration(remaining_time, natural=True)}** before using this command again!",
                 )
                 return
 
diff --git a/utils/discord.py b/utils/discord.py
index 6913743..ad26fca 100644
--- a/utils/discord.py
+++ b/utils/discord.py
@@ -90,8 +90,7 @@ class ChannelResponseWrapper:
         self.sent_message = None
 
     async def send_message(self, **kwargs):
-        if "ephemeral" in kwargs:
-            del kwargs["ephemeral"]
+        kwargs.pop("ephemeral", None)
         self.sent_message = await reply(self.message, **kwargs)
 
     async def edit_message(self, content=None, embed=None, view=None):