Is there a block that will delete all clones that are on the screen? The only block that seems to do that is

and you can't put it inside a script, only at the end.

There is not such block but, the ‘delete this clone’ block should delete all clones created from the sprite where the block is used

Yeah, it can get kinda weird sometimes. Something you could do is use a broadcast. Since clones receive broadcasts, you could do something like this:

All the clones will receive the broadcast and delete themselves.

Thanks for your help! I will try those methods.