I have a 3.1KW very powerful pressure washer always plugged in and connected at the back of the house. Im muddy or in winter covered in all that salty road crud I just go down the drive and get my GF or a carer to blast it for about 4 mins until everything runs clean. It and not me! Usually works ok... Use car wash and wax with a sponge / car brush with long handle and give it a good scrub now and again. Quick drive up and down the street to dry and in I go!
Even do my shoes and the whole chair other than the armrests. Those get took off and done seperately as needed. I do this at least 50 times a year. Water doesent hurt unless you aim it directly ar the control pod or under the seat controller. Never had any issues. Even if it did I am already home.
Remember that I have a brand new chair ready to go every april though! Then the oldest of my three gets a rebuild!
You have to realise I am a bit OCD too! My 3.5 year old van is cleaner and shinier inside and out than a showroom one too!
My chairs are all fully super smooth gloss hard powder coated (there are many types and qualities of powder coating) down to every single last part. Or its stainless steel. Like all the bearings, bolts, washers etc. Theres nothing to corrode and it washes clean really easily.