have a small tube of thermal grizzly kryonaut that I opened about two months ago on another job, I put the cap on it and today I put some on my cpu, I normally do the pea method but I noticed it didn't cover all the cpu area so I decided to spread it which didn't work because it felt dry and hard as I started to spread the thermal paste started to peel , is this because It has to be used when opened I was also thinking it could have been the cold weather .