The right way, Jack...
Once a year (fall is actually the best time, because it protects all the seals and valves from freeze damage), open up the pump and slather everything in it liberally with SuperLube, which is the same thick teflon grease that's in it when it leaves the factory. Unlike anything just poured down the toilet, it doesn't wash out in just a few flushes...it lasts at least the whole season. And it provides an opportunity to inspect the seals and o-rings and replace anything that's worn while you have it apart instead of discovering that you should have when the bowl is full and won't go down.A head squeaks due to friction between the seals and the pump housing. And every squeak wears the seals and o-rings a little. So just pouring something down the toilet each time it starts to squeak is a little unnecessary wear that results in more frequent rebuilds. And thin oils or other products poured down the toilet don't provide any protection from salt and grit that can score the pump housing. It takes about 30 minutes once a year to do it right vs. a never-ending battle to avoid doing that 30 minutes work....kinda like just adding a little oil to an engine each time it starts to smoke instead of changing the oil and filter regularly...it may keep it running for a while, but in the long run it'll cost you more.