How do I remove hard water stains on glass shower doors?

Try hydrogen peroxide on a cloth.wipe on n let sit. HP is also antbacterial, antifungal n natural.

Rubbing alcohol

Warm water and dawn dishwashing liquid with a scrubbie. Works every time. Has to be name brand Dawn.

I use a bunch of used fabric softener sheets straight vinegar no water. The remaining softener in the sheet will also slow down the build up.

Canola nonstick cooking spray could tackle soap scum buildup in your bathtub, shower, and sink? Since oil breaks down lime deposits, a quick spritz of cooking spray on your bathroom sink or shower tile will remove any gross grime in no time. Also leaves a coating that will repel water.

Just like nonstick cooking spray can remove tough grime buildup in your bathroom sink and tub, the same goes for cleaning your shower door, too. Simply spray a bit of oil directly on your dirty shower door to clear away the lime deposits and dirt real quick. Use a kitchen scrubby to clean off the crud. The fine coating left behind will repel water.