I want to have a towel holder in the bathroom without drilling. If I use those self-adhesive racks on tiles would they create a problem to the tile? Does it depend on the type of tile? In my case it is those shiny ones (not sure how they are called)
You're probably fine.
If I use those self-adhesive racks on tiles would they create a problem to the tile? In my case it is those shiny ones
It sounds like you have glazed ceramic or porcelain tiles. The glaze is glass so if some adhesive residue is left behind then it can easily be cleaned with a cleaner/solvent like Goo-Gone, Windex, acetone, brake cleaner, orange citrus, etc...
If you had a porous tile like granite with no glaze for some forsaken reason then I do not recommend putting adhesive on it.