Hi there, recently I was cleaning my partner's shower unit and a bottle of Ajax Spray & Wipe (lemon fragant) and it seems to have BROUGHT UP a stain of some kind - it's a funny pattern, not made from where the liquid spilt - it's a patterned dark red stain and it's on plastic (fake wooden-looking) lino tiles. HELP! His land-lady is pretty strict and specifically asked him to be careful of making any stains or scratching it! Thank you.