For Daily Use:
1/3 cup rubbing alcohol
1 cup water
- Mix in a spray bottle and shake. Apply to surface, no rinsing required.
Tile and Grout Cleaner:
1/2 cup of baking soda
1/3 cup of ammonia
1/4 cup of white vinegar
7 cups of water
- Combine all the ingredients in a labeled bottle and shake well to mix. Apply to surface then wipe off with a damp sponge. Do not use with bleach.
*Source: Queen of Clean 
3 cups hot water
1/2 cup Vinegar
1 TBS Dish Detergent
1 TBS Borax
- Mix together in a bottle, shake then apply to area as needed.
*First published February 14, 2007 and moved to this page for better organization
If it’s just regular cleaning you need to do, simply pour vinegar in the tracks, soak for a few minutes then rinse out with water.
Make sure the drain holes aren’t clogged with gunk, you want the water to flow out easily. Also lay towels on the bathroom floor along the bathtub to catch any water overflow.
If it’s a grime, gunk and mildew disaster on your hands, you can try the following tips…
First clean out as much as you can, then stuff the drain holes with small, tight wads of toilet paper or chunks of paper towel. Pour preferred grime buster solution (listed below) in the track to completely cover without flowing over, then allow to soak for an hour or two.
Loosening Up The Grime:
- Denture Tablets (first dissolved in warm water)
- Bleach & Water
After soaking, unclog the drain holes and allow cleaner to flow out of the tracks. Rinse well with hot water. Then get your tools out and dig into the little corners and crevices. See below for some tools to try.
- Shower Track & Grout Brush
- Old Toothbrush
- Handheld Steam Cleaner
- Screwdriver and rag to dig into grime corners
If things are really bad:
- Remove the doors to do a thorough cleaning job. Instructions can be found at WikiHow .
- I don’t know how the above solutions will react with all the various metals and finishes used for tracks, please test first before using to ensure they (or the finish) won’t be damaged.