That is the reason I nearly always make mine fresh just before casting.
I do use a mix of pellets for bagging and meshing; halibut, CSL, bloodworm, koi/coarse and GLM in various sizes.
Note, the Crafty Catcher bloodworm and GLM seem to be oversprayed.
I managed to leave some Nash bags in my trouser pocket once, I was quite surprised that they were still undissolved after an hours 40⁰ wash. The plastic bag they were in had allowed water in, but the bags themselves were still almost intact.