Best way to clean the carpet against baseboard??


I have kept my off white carpet spotless and clean (cats and all) in several rooms of our house. However, we are downsizing, so I want it perfect. There is at least an 1/4" of soil (black) my machine would not reach. Driving me crazy. Has anyone used OxyClean, Ajax soap, Window cleaner, and rubbing alcohol ( small amts. -tbs,) mixed then with hot water and then spray/scrub/suck up water, then repeat until clean?????? Other success mixtures or techniques you can share???? Thanks, Cindy

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