I washed the head weekly of my previous Panasonic shaver with a little liquid hand soap and running water. After the head dried it began to develop a slight odor which I ignored. Panasonic makes no mention in their owner’s manual about using any lubricant and I never used any. It’s the only time a shaver I owned developed an odor. Shaving dry and just brushing out the cuttings has never developed any odor nor required lubrications. here