We have a 1400x900 walk-in shower cubicle with a smooth surfaced resin tray. We presently use those mats with suckers on the back as an anti-slip precaution, but they're a PITA. If you leave them down, they grow evil things and mark the tray, so they have to be taken up and "spritzed" with bleach. The transparent PVC ones discolour and the rubber ones stretch and go a weird shape. You have to store them when you're not using them.
So, I've been thinking about putting down some anti-slip stickers instead. Do these work? How long do they last? If they wear out, can you get them off again? Do they grow evil things? Any other thoughts/comments?
[Now off to get in the shower.]