Shower Soap Holder

I bought something called a Twist suction soap dish, I tried to put it on my shower wall and pressing and turning, but it just falls away. I tried to put water on the back too.
how do I get to stay?

It could be that you have some type of soap or detergent residue on surface.Try clean area thoroughly and again with bleach, rinse with water between the thoroughly.If cleaners.Dry does not work, and you really need that, try to use crazy glue. Also, a holder easiest type of soap is one that hangs from the shower neck.I have this type and it works w / the chance hassle.Good.

you can stick with glue silicone, it will not mildew