Cheer Darran. I'm kind of being forced into it as my neck is on it's last legs. Been looking up for too long. Plus I actually enjoy pressure washing.
Have you considered seeking some form of medical help?
Someone who specialises in deep tissue or sports massage might be able to do something for you.
I was having neck and shoulder issues and when my Mrs was massaging me she said the trapezius(?) muscle on the left side was solid as a rock.
She massaged me a few times which helped some, but i visited someone before the lock down and they gave me a right good going over and remarked that my blood flow was being restricted and the muscle was tensed up.
I have only managed one session due to the situation at the moment but i started noticing an improvement a few days later.
Although i did feel like i'd been run over by a bus 1-2 days after initially.
I will be going straight back again when this lock down is over.
I reckon it's the repetitive movements in this job that build up and cause the problem for some of us.