I've been reading some old threads about measuring temps inside the incubator. My Brinsea Spot Check thermometer changes moment by moment from 99.4 - 99.5 - 99.6...it kinda' makes me crazy. I read that the "water wiggler" can help moderate these quick fluctuations that the thermometer is picking up....but I have no idea what a water wiggler is!!! Do you know what it is? Do you have a picture?