To fix a tile that pops up later reactivate the adhesive by heating it up with an iron.
Tile not sticking to wall.
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.
Wash the wall with a mixture of 1 part mild dish soap to 6 parts water.
It cannot cure too fast.
Or take them all down putting wax paper between each tile so they don t get damaged.
It must be easy to work with and it must adequately fill in gaps between the tile and the substrate.
It is a good idea to clean them the night before you plan to do the tile.
Then prep the wall and use the adhesive made specifically for the tile you have.
Demands placed on tile adhesive are both extensive and steep.
Sometimes self stick vinyl tiles won t stick only after the fact.
Many people think that with peel and stick tile you should not have to use adhesive at all.
Use gorilla glue to replace each one.
If the wall is wet the tiles will not stick.
Just lay it lift it back up and check for coverage.
Could be as simple as not using the correct size trowel the back of the tile has to be covered 90 percent with thinset.
Tile adhesive is expected to hold the tile in place not just for years but for decades without fail.
Otherwise you do not have adequate working time.
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.
The problem is the size and weight of the tiles first is the tiles porcelain if so they should not have been fixed to plaster walls and you should of use powdered adhesive ready mixed is only good for ceramic tiles up to 300 x 300 the walls should be clad with tile backer board including the smooth finished wall and any priming should be done with sbr diluted.
Tile won t stick to thinset.
Ok this problem pops up all over the internet i renovate really old buildings for a living for the passed 35 years.
You can apply many self stick wall tiles over top of existing tile or an ordinary smooth wall surface such as painted.