Slither.io Slither io Custom Skins Slither.io 2 days ago A simple guide to changing skins. Click “Share to Facebook” or “Share to Twitter”. A new tab will open up. Once you are done sharing, refresh and click “Change Skin” on the bottom left. Use arrows to switch between skins. Slither.io Mods v3 Released! How to install Slither.io Mods?