How do you clean the textiles? Hood and seat - as they cannot be removed?
There are many ways to clean a pram or a pushchair, and machine washing would actually be the worst from the long-term point of view. My first advice would be to wipe clean it (actually, WaterWipes are my best friend in here as they clean so so well when it's not a heavy stain) or to use a foaming product that is normally used on the seats in a car.
I actually wrote the whole guide about stroller cleaning maintenance (read here), it will make it clearer to you - it's a bit of a long read, but it will help you clean and maintain your stroller in a good condition (so it's worth reading) 😉