It's easy to take good care of your grappling dummy for it to last years if you practice regular cleaning and maintenance on it. If it's leather, you should consider an anti-bacterial wipe down with regular household cleaning products to ensure it's free of sweat and a build-up of bacteria, which can result in bad odors in the future. With a cloth or fabric-based materials, you can still use spray or wet wipes, but ensure that you wipe down any excess moisture and have your dummy somewhere it will be aired freely and, most importantly, dry quickly.