nacho cheese warmer

I am thinking about getting the type with the heated spout…(pump not bag)
do you leave the can in all the time do you re refidgerate each night…if we open a can and only use 1/3 then what to do at close?

We have the same type of warmer and what we usually do is just take the can out at the end of the night and refridgerate it.

Typically, you are going to want to refrigerate the can. That is, unless the cheese says not to, which is rare. Some units use a bain marie pot to hold the cheese and in that case you would throw some plastic wrap on top of the pot and put it in the walkin over night.