I never knew the coagulation was a side affect of using clay based grease. Coagulation is a big problem - think PTO shafts (for which I've been using DryLube, not knowing why the grease hardened up). Thanks for input.I've never had a plugged grease fitting in 30 plus years because I don't use cheap clay based grease. I only use synthetic grease that don't coagulate in the fitting.