I have a clay garden, plus all this rain means there are millions of them. I have sunk a couple of yoghurt pots either side of the raised bed, filled with beer. I have had to put a lid on them to keep the dog out.
I've also taped bubble wrap around the edge of the plastic greenhouse to seal it - they still get in.
now i've put anti slug gravel around the edges of all the pots - its broken up ceramics thats sharp and drys them out.
I gave in and bought slug pellets yesterday so fingers crossed.
Does the copper tape thing work? not enough birds in my garden yet.