Umbra® Suction Cup Hook 5 "Keep it in stock - update instructions" Cissy 30 July 2010 Hi- just having looked at all reviews you hate it or love it - I LOVE IT - BUT, I think it needs better instructions how to fix them on tiles: just cleaning with a towel isn't enough, you need, as you say, a very smooth tile, and you need to degrease it properly by using pure acetone (from the chemist). That's what I found out, my hooks all stick firmly, some of them holding heavy towelling dressing gowns, no problem. I am so glad I did not need to drill new holes in my brand new bathroom, so thank you for this product. A note from the team Thank you for your review. I'll pass your useful comments onto the buying team.