We’re selling our house soon, and as I was looking upstairs on our use-to-be gorgeous white carpet, there was a large chocolate shake stain. It’s definitely set in for who knows how many weeks, and I am terrified that I won’t be able to get it out. I have tried everything from carpet cleaner to oxy clean to bissel spot cleaning with the both. What can I do to get this set in stain out? Please help!