More of this: Towel-drying fixtures after you towel off.
Less of that: Spraying and scrubbing soap scum.
The key to keeping soap scum under control is to wipe off moisture and soap residue before it dries and hardens. Hang a spare towel in the bathroom for drying fixtures and corners where water tends to gather. Soap scum develops when calcium in water mixes with fatty acids (often found in bar soaps), so switching to a liquid body wash may help the cause, too. A surprising way to get rid of soap scum that has already built up? A damp dryer sheet.