Use lemon oil instead of harsh cleaners. Coat a soft,(I prefer flannel) with lemon oil and wipe down. Removes soap scum without effort and leaves glass shining If badly coated with soap scum it may take a few times to remove all, but far better and easier than the harsh cleaners

This works on mirrors as well. Put a small amount of lemon oil on cleaning cloth and wipe till oil streaks disappear

Bonnie