anyone know any tricks to reduce or eliminate the crystalization of mannitol in the 50 ml amps.

I have forgotten, what is the purpose of Mannitol? My nurse says they no longer use it as they've had problems with it.

Keep it warm. If it gets too cold the crystals will form. We used to put it on the toaster oven after breaks.

We keep our mannitol in an egg incubator. They can be purchased at a farm supply store or on the internet. It's a low-tech solution, but it works well. If it doesn't already have one, you should keep a thermometer in it.