I don’t get people asking me how to do their own carpets, but a customer asking about spots is quite common.
I offer to drop off a wuart of spot cleaner next time I drive by. I ask them to buy or find me a spray bottle and when I get there I mix 4 oz of
Releasit with a quart of hot water and put my own (waterproof) label on it. It is sailor proof, they simply cannot screw it up.
The label has simple instructions and they are told to call me in for anything they cannot deal with themselves. My return on the cost of materials has been about 2500-to-1.