I have looked at this video...
I really don't fancy taking the whole handle apart

The water is coming out at the top of the trigger part of gun, loads of it. The bloody thing was perfect last time I used it a few months ago. It is well stored in a garage and I look after it. Plus it's not that old - maybe 2 years.
Petrol wilks-usa tx 625i.
Is it likely to be an o ring inside the gun handle and I should just go there first, or is there something else it could be? Something simpler? A connection elsewhere?
How infuriating - this is the first day in ages I have time to use it and now the fecken thing won't work. Pressure at nozzle is pathetic.