2006 Fleetwood Orbit - Shower drain clogged?

Many of the shower drains don't drain through the floor directly below the shower. Often they run along the floor under cabinetry and then through a common hole in the floor with the sink drain. This means there is very little slope to the drain and if the trailer isn't perfectly level you may have a small puddle of water at the shower drain. My current trailer won't puddle in the shower pan but it is very near the top of the drain where it is easily visible if my trailer is slightly right side high.