Don't know about the generator but I went through a bunch of water pumps until I figured out that I was adjusting the belt too tight.
What works for me is to loosen up the bolts on the generator, let it settle by gravity, and then tighten all the bolts. At most pressing down on the generator with a couple of fingers. Belt seems very loose based on modern car standards but it does not seem to be slipping (cooling system works great, generator charges properly, no glazing on belt or pulleys, etc.).
My car has the older wide belt. I don't know if you'd need to tighten the newer thin belt more or not.