Dirty Carpet
You get the most expensive carpet for your house and that is why it feels like hell when it gets stained. You know washing stain off the carpet is not an easy feat nor you can put the entire carpet into the machine everytime it gets stained. One thing that you can do is cleansing the carpet with WD-40. Just put some of it on the carpet and get it removed with a sponge and soapy, warm water. Do it till the stain is completely gone.