Insufflator bulb?
A blood pressure monitor bulb works fine. Search the ebay and there will be lots of them for very litttle money
Sorry for the delay in response, i was looking for my shutter but have apparently put it “some place safe”. The bulb i purchased was a generic squeezer from a medical pharmacy. Designed for clearing throats or earways or noses. It has two big flat tabs on the nozzle preventing penetration beyond 1/2” or so.
Once i find the shutter I’ll demonstrate it with just my breath. I still think that would work fine.
--- Steve from Missouri ---
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