Interesting tip.
I use a Quattro because the electric razor that can give me a close shave has yet to be invented. I've always tried to make my blades last as long as possible (I usually get 6-8 weeks out of one) but I may have been going about it the wrong way. I've tried to dry my blades every morning but perhaps keeping them wet is a better option. Thanks!
I first started this experiment about a year ago using baby oil, which worked fine, but one day I spilled it and refilled the cap with water ... that was about 3 months ago.
I get 2 - 3 months also with cheap throw away razors.