Minecraft Java Edition – How to Get Rid of Slimes in Mob Trap

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My mobtrap was working perfectly a few hours ago. After relogging to the server, a massive amount of slimes spawned in my trap. They seem to be unkillable and block the canal and grinder. How can I get rid of them?

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Best Answer

According to the Minecraft wiki they should be killed either on contact with lava (by burning) or by immersion in water (by drowning).

So unless things have changed you need to either make sure that they touch the lava or fall into the water. Then to make sure they can't jump out of the water you'll have to make it deeper (and possibly wider).