I think you should definitely keep the froggers!

Remember that during the winter your heater is evaporating water at a much higher rate than the a/c will in the summer. Heating is very drying. I don't have froggers, but for my own comfort and my animals comfort, I use a couple of humidifiers in my house during the winter months.

A side benefit is that it also eliminates static electricity, so no more shocks from anyone! Not to mention that it soothes a sore throat.