My mom just had these tiles professional installed in her home. There is some sort of glue or grout or something that is left on top of the tile. You can see residue from something that has left an imprint of the word Avaire on some of the tile and on other you can see an imprint of the web looking plastic from the back of another tile. Has this happened to others? What would cause this? and how can it be fixed? If it would help I may be able to take a photo to attach. Just don't know if it will show up. Thanks!