Vacuum First, Then Scrub
For a really thorough cleaning, start at the top, vacuuming the dust from light fixtures and the top of window casings. Then work your way down. And finally, vacuum the floor methodically so you cover every inch. You don’t want to leave any stray hair or dust bunnies to muck up your cleaning water. A soft-bristle upholstery brush works best for this type of vacuuming. Figure out what vacuum to use here.
Buff Off Heavy Grime
Pick up some polishing compound at a home center or an auto parts store and use an auto buffer to polish off the offending scum. If you don’t own a buffer, you can buy one for as little as $20 or borrow one from a gearhead friend. If possible, remove the doors and take them out to the garage to avoid messing up the bathroom.
Protect Your Shower Doors From Mineral Buildup
Follow the instructions on the package to apply the treatment to your shower door glass. You can buy Aquapel online or at local dealers. You’ll find Rain-X at any auto parts store.