Not unless it's humidity from the tank, and the sump was in an open area. Dry air in the winter, and dry air due to strong A/C in the summer. When I messed up my dosing here it caused a precipitation issue that got my circulation pumps at the same time as the skimmer. Fixed that and all has been well since.
For whatever reason I haven't had issues where the air line comes in, just between the magnet and housing.
Thinking about it, I should look at my spare skimmer that was having starting issues and see if it is scaled up.