For the first 20 or so Astra SP blades I used they were for one-time use and then I would toss them (I only shave every 2-3 days). I've moved on to using them twice before I toss 'em and get a quality second shave, but I don't think the third or fourth shave would be very comfortable. All I do after the first use is shake the handle, towel the razor parts (but not the blade), and rack it. After the second use I toss the blade then disassemble the razor and rinse and dry all the pieces. I may try experimenting with prolonging a blade's life for more uses with alcohol and pat drying, but these Astras are such a great value that it may be a waste of time.