Review on Scrub Daddy Sponge Holder: Ultimate Sink Organizer for Kitchen and Bathroom - Self-Draining, Easy to Clean Dishwasher Safe, Universal Sponge Caddy for Sponges and Scrubbers by Roy Cook

I bought 2 containers of Scrub Daddy Sponge Caddy. None of them will stick to a sink or even a mirror for more than a few hours. I made sure the surface is clean and the suction cup is clean. You won't last. I tried moistening the suction cup and it helped a little, it took about 8 hours. After that they just fall off. I even tested them without anything in the caddy and the problem was still there. They really need bigger and better suction cups. I found a third party that makes a Scrub Daddy holder that attaches to the sink that has a much larger sponge and has stayed in place for 2 weeks now. While Scrub Daddy is great, Scrub Daddy Sponge Caddy is pure junk.