At our local art center, we make all of our own glazes, have done so for years, and so our recipes are "tried and true."
Recently, however, we have been having some problems with several glazes, a few problems with texture and bubbling, but mostly color issues.
So we are now busy attempting to identify the source(s) of the problems. One thing we are considering is our chemicals.
My question is, can being stored in a hot environment have effects on glaze chemicals? We have recently been storing and mixing them on a balcony overlooking the glass blowers' hot shop. In the summer (this is Florida) it frequently exceeds 105 degrees up there when the glass people are going strong. Possibly higher - you can understand that I have not been tempted to check.