You know carpet cleaning takes a lot of effort but also more expense.
Commercial solutions are made up of many chemicals.
Here is a very effective alternative solution, less expensive and which will allow you to clean them easily.
You will need a clean spray bottle to mix it:
1 tablespoon baking soda
1/3 glass of white vinegar
A hot water bottle filled to 5 centimeters from the neck of the container
1 tablespoon of washing powder
Sprinkle the carpet with this mixture and wipe it with a brush. All stains will disappear very quickly!