
I tried various products from carpet cleaning shampoos to Sonax spray cleaner none of them worked as I thought.
So I decided to disassemble the front car seat and remove the seat cover and then clean it.
My car seat is a non-powered type that makes it simpler to work with.
First I removed the car seat by 4 (8mm) bolts and also disconnect connectors.
The disassembling seat is not hard but putting back everything is more challenging so it is better to take photos in every step.
the seat cover is attached to crushing with metal ring goal is to widen the gap between those rings to remove the seat cover I used screwdriver and plier to do that and also use those rings after.
after removing covers washing makes so easy and effective. and the put all back together. It takes a whole day for me but worth it

and here results