Got tired of fighting with the cheap Headmate units, so upgraded to the Raritan - I think it's the PHC model. Works as it should and even the Admiral likes it - the pump doesn't squirt on her fingers! As for the maintenance, it's due to the chemistry of the thing (salt water plus acid...) and there's no avoiding it, even with a $1000 toilet. As for the lubricant, I use silicone grease - doesn't affect the seals, just keeps them moving easy.