To clean glass shower doors effectively, a common and efficient method involves using a mixture of household ingredients as follows:

• Mix equal parts of white vinegar and water in a spray bottle.
• Add about a teaspoon of dishwashing liquid to enhance cleaning power.
• Spray the solution generously on the glass shower doors and let it sit for about 15 to 30 minutes.
• After soaking, scrub the glass gently with a sponge or a soft scrubber to remove soap scum and hard water stains.
• Rinse the doors thoroughly with fresh water.
• Dry and polish the glass with a microfiber cloth to avoid streaks and keep the doors sparkling.

Additionally, for tough hard water stains, rubbing half a lemon dipped in salt on the glass can help break down mineral buildup. Preventative maintenance like wiping down glass doors with a squeegee after each shower and applying water-repellent treatments can keep the glass cleaner longer. Avoid harsh scrubbing tools that could scratch the glass, and consider regular cleaning to reduce buildup.