You know those little packets that you often find packed in a shoebox or with a moisture-sensitive gadget? The ones that say "Don't Eat" and "Throw Away"? Those are silica packets, and the gel inside can make your razor blades last longer. Here's why.
When you shave, you're getting a metal razor wet which can cause it to slowly rust if the moisture isn't removed. Silica is desiccant, meaning it removes moisture and keeps things dry. Storing your razor with silica gel can help to eliminate this excess moisture and prevent your blades from rusting, therefore lasting longer. Combined with this razor sharpening trick you may be able to keep your razors for many years. Just be sure to always wash them before use.
8 Clever Uses for Silica Gel [Popular Mechanics]