Is it true that rubbing a disposable razor against jeans will make it last longer? There's a post on reddit saying that it does.

Hmm prevents oxidation?@MrBrownstone

@Longpatrol I guess so

@MrBrownstone the oil probably helps to keep the metal from deteriorating so quickly because water can help to break down the metal.

@Longpatrol yes, it is not use that causes the blade to dull quickly, but, rather, rust. Oiling the blade (as with any blade) prolongs usefulness, but disposable razors are fairly dull to begin with so don't expect too much