A glass shower looks great when it is clear and tired when it is cloudy. That cloudy film is two things mixed together: soap scum, which is soap residue bonded with minerals, and hard-water spots left behind when droplets dry on the glass. Houston-area water has enough minerals in it that both show up quickly.
The single most effective habit takes about twenty seconds: squeegee the glass after the last shower of the day. If the water never dries on the glass, the minerals never get left behind. Keep the squeegee hanging inside the shower so it actually gets used.
Leave the door or the bathroom fan open afterwards so the enclosure dries out. A shower that stays damp grows mildew in the door track and along the caulk lines, and that is much harder to clean than the glass.
For a weekly clean, spray the glass with a mix of equal parts white vinegar and warm water, give it a few minutes to work, wipe with a non-scratch sponge, rinse, and dry with a microfiber cloth. Skip the vinegar on natural stone such as marble or travertine, which acid can etch — use a stone-safe cleaner there instead. And never mix cleaning products, especially anything containing bleach with vinegar or ammonia.
Do not forget the hardware. Wipe the handle, hinges, and the bottom track, where water sits longest. An old toothbrush gets into the track and the corners of the frame.
If the glass is already heavily clouded, it usually takes a proper deep clean to bring it back, and regular upkeep after that to keep it clear. Call (346) 464-7185 for a free estimate.