Spackle, MH Ready Patch, Drying In Can: What to Add?
I have a quart of MH Ready patch spackle, good stuff (as recommended here in the forum). I still have a good third left, but it's started to thicken...it isn't dried and hardened, but it will be if I do not do something.
What can I add to keep it soft and prolong its life span in the can?
THe can shows the following ingredients: