Re: recumbent washing machine
Not the easiest of brushes to change in situ TBH, I would advise removing the motor completely.
I’m 61 and my old knees have suffered from 20 years of football and thirty years of squash ( and still playing 🙂 ) but I still manage.
If it has the small teardrop shaped back panel then if you tilt the machine forwards against a wall and use a small socket and ratchet it is quite easy to remove the motor, just prise it off the drum mountings.
If it has the large full size back then motor removal is a doddle.
Jim.