My daughter has got a four-wheel-drive, all terrain baby buggy with off-road tyres. It’s probably got floatation bags and an electric winch. When you fold it up and put it in the car (hopefully you have retained all your digits) it can transfer all its mud to the other items of the boot — the travelling cot — the bags for life — the steriliser and all the indispensable baby paraphernalia.
The alternative is to attack it with baby wipes or to run it through the sea or a river ford — then it makes everything wet.
So here’s a thought:

This is the de-lux model but a cardboard box will do
That is a precious photo, Diana!
This is lovely Diana. As a Gran-to-be I have been looking at car seats, buggies and bouncers (and any combination of the three). !!