Strange "pink stuff" freezing problem

I'm back to blowing out air lines again also. My personal opinion is that only a little amount of water dilutes the pink stuff where it won't do its job. I now save the pink stuff for P traps and toilet so gasket doesn't dry out and spilt rest of pink stuff gallon between black and gray tanks. My toilet water valve froze up and I know the toilet was running pink. So back to tried and true method.