Sometimes self stick vinyl tiles won t stick only after the fact.
Tile not sticking to wall.
Wash the wall with a mixture of 1 part mild dish soap to 6 parts water.
Be sure to spray the wall surface with water to activate the glue.
Use gorilla glue to replace each one.
Otherwise you do not have adequate working time.
Tile adhesive is expected to hold the tile in place not just for years but for decades without fail.
Stick the suction cup with the silicone to the tile as usual.
A tile wont stick even if the wall is a little damp so what we do is use dry wall adhesive to stick the tile then after 24 hours drying time use white grout to finish.
If some silicone has leaked around the suction cup don t worry just wipe the excess silicone from the tile with a paper towel or a cloth.
It is a good idea to clean them the night before you plan to do the tile.
It cannot cure too fast.
Fixing a tile that pops up later if the corners peel up heat the tile to reactivate the adhesive then place a stack of heavy books on it to weigh the corner back down.
Or take them all down putting wax paper between each tile so they don t get damaged.
Just lay it lift it back up and check for coverage.
It must be easy to work with and it must adequately fill in gaps between the tile and the substrate.
Could be as simple as not using the correct size trowel the back of the tile has to be covered 90 percent with thinset.
Do not clean them with a solution that is gritty or has crystals in it as that could mess up the adhesive in the tile backing.
Demands placed on tile adhesive are both extensive and steep.
You can apply many self stick wall tiles over top of existing tile or an ordinary smooth wall surface such as painted.
Tile won t stick to thinset.
Then prep the wall and use the adhesive made specifically for the tile you have.
Ok this problem pops up all over the internet i renovate really old buildings for a living for the passed 35 years.
If the wall is wet the tiles will not stick.