I stopped using the foam sticky feet as I found if I put barrier cream on they didn't stick very well and if I didn't, they stuck too well and often left chunks of black foam on the soles of clients feet! (Yuck!). I now use the cardboard sticky feet (EBay) and I find them cheaper and easier to use/remove. (I scroll through eBay and see who's offering the best deal at the time!). I also used to put couch roll in the bottom of my tent and then use it to wipe the tent down after but found it moves about too much when I'm spraying and ended up on their feet rather than under them at times! Also, it all adds to the cost using loads of couch roll so I now have cheap black towels and I place one on the bottom of the tent (no Powder though!) and then use it to wipe the tent after as well and just pop them in the wash.