First of all thanks for the welcoming words and the advice!
If I am being completely honest and even if it may sound a bit 'cruel' or disgusting, I began to quite like the pop when I stepped on them and it was always a bit satisfactory when I got another one
Glad this isn't a snail lovers community, I think I will continue with my current method of killing them.
Just wanted to know if it's very painful for them but that seems to not be the case