The sweep attaches to the inside bottom of the door and has a drip edge to direct water back into the shower and a rubber sweep on the bottom of the door to keep water from splashing out.

If your shower door is rubbing on the bottom track, you might first look at the shower sweep, which is the rubber piece secured to the bottom of the door to keep water from splashing out. (Getty ...

If the door has rubber gaskets or a rubber door sweep, check them for gaps. Also check for any gaps in the caulk where the shower or tub meets the flooring.