Getting Rid of Hard Water Stains?
Try Bring-It-ON water spot remover. Its a paste that you wipe on, leave on for a few minutes to dissove the minerals, and wipe off. Invented by a gal that got tired of trying things that didnt work!
Cleaning "Hard To Reach" Places
I found a 12-foot long duster at touchoforanges.com. No problem reaching high ceilings and ceiling fans now!
Removing Yellow Spots (Lime?) From Floor
Sounds like the minerals have bonded to the pores in the tile. Bring-It-ON cleaner was the only thing that worked for me.