Good morning.
By revealing myself as being very senior citizen, and probably not the only one, who loves his 'pocket rocket' as much as I do, there are only so many things I can do myself. What I would like to do is to completely drain the system of all the now very murky water. Keep running clean water through it till I'm satisfied. Then finally replace the cap. Is draining the system and refilling a job I could have a go at or get someone else to do. Be honest. I won't mind.
Jonathan