Buff Off Heavy Grime

If you have glass shower doors in your bathroom and don’t keep on top of the cleaning, you can end up with soap scum so tough that it’s nearly impossible to remove. That’s when you bring out the heavy equipment.
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.