The purpose of incognito mode is to keep your web browsing activities private from other users. It will automatically erase your browsing history and search history, and won’t pick up any cookies.
Sometimes your browser builds up cache and if you’re uncertain how to clear cache, a quick way to disable it, is by using Google Chrome incognito mode.
You can simply click on the 3 bullets to the top right of Chrome and then select “New Incognito Window” or “Shift+Command/Control+N”. See video on how to do it.