Either that or they have trampolines or pogo sticks.![]()
The beer works well. I've used these traps before with lemonade too which works if you don't have beer in the house. I think any kind of sweet liquid will attract them.
A word of warning though, don't leave it too long before you empty it out and replace the beer. Drowned slugs are pretty disgusting anyway but even more so after a few days of fermentation!Empty it out each morning if there's anything in it.