Here's hint/tip on a homemade all-purpose carpet cleaning solution. Fill a spray bottle with white vinegar and water (half & half).
Using Dawn Dish Soap as a Stain Remover
DIY Carpet Stain Remover
Using Vinegar and Water in a Carpet Cleaner
Using Shampoo as a Clothing Stain Remover
Homemade Furniture Polish Recipes
Using Shampoo as a Carpet Stain Remover