Ok, so I have had my skimmer for almost a year now and it has been working great. Today I took the skimmer out of my sump to perform preventive maintenance and give it a good cleaning. First I completely disassembled everything and rinsed it good, including the pump. I too out the pinwheel and scrubber it with a toothbrush. I re-assembled it and put it in a plastic tote in preparation for a vinegar bath BUT had not yet added any vinegar to the tub. I fired the skimmer up and it was producing very few bubbles. The airline is not obstructed in any way and I checked and rechecked my assembly of the pump. The pump usually produces at least 100x the amount of bubbles it is producing right now. I don't know what to do for now besides let it run and see if it is "breaking in" again. What do you think skimmer experts?