The only time I can recall pollen causing a problem was when it plugged the air-intake filters on an amp's cooling system. It was a monster, fan-cooled amp that drew air in from the outside, blew it across the tubes and out a grill in the bottom of the amp. The filter plugged and everything overheated. Keep in mind, however, that this took place after playing a nightly Tiki Bar during the height of pollen season. I seriously doubt that there would be a problem for those performing indoors.

Also a good reason to keep your gear stored in zippered cases.

Good luck,

Gary