Skuzzy,
This may sound like a terrible question since you've already been using it but is there any moisture at all in these or do you find its blowing dry enough air not to give it a thought?
The only moisture possible is from the ambient air, as it is only moving ambient air. It has a filter on the intake to remove particles so the air is just cleaned up ambient air. It does warm the air, slightly, as the air is also used to cool the motor while it operates.
A lot less chance of moisture in this blower, than from compressed, canned air.
I take the precaution of taping down the case/CPU/GPU fans to prevent them from rotating as that generates current, which is not a good thing.