Here are a few ways you can make your guitar strap last longer, 1. Make sure you choose a good quality material for your guitar strap. If you are going for cheap materials, your strap will rip faster and will not last very long. Leather is a very good material for guitar straps. If you buy a good quality leather strap you probably will not have to buy another one. 2. Make sure you buy your strap from a trusted company or brand. Handmade and handcrafted guitar straps can be good options as well. 3. You can use mild cleansing materials to clean dirty straps.