Short answer: most leaks come from worn seals or gaskets, not the glass itself, and are a cheap fix. A leak that keeps recurring after a seal replacement often points to an installation or slope problem underneath.
The easy fixes
Worn door sweeps and seals are the most common cause and the cheapest to replace — a sign it's this simple is water escaping right at the bottom edge of the door, not from the sides or top.
The bigger problem signs
If water is finding its way out from the sides or the base of the enclosure itself, that can mean the original installation wasn't properly sealed, or the shower pan has a slope issue directing water the wrong way — both are worth a professional look before they cause floor damage.
Don't ignore this: a shower leak that reaches subfloor over time can turn a $100 seal fix into a much larger repair. If a new seal doesn't solve it within a week, get it looked at.
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