Product review (5 stars): Takes a beating!
We use an incubator to hatch our baby chicks.  This device fits handily inside of the incubator, and can let you know if you need to add water to maintain a certain humidity.  We searched high and low for a site that would tell us what this humidity level was, but no website would give us a straight answer.  Once babies started hatching, they knocked this thing over and crapped on it, presumably to establish pecking order.  In the end, the Vicks monitor was the victor, because it all washed right off.