it is, but i hadn't actually cleaned it, it has been about a year since it was last calibrated.
the reason I didn't jump straight to the grinder was it's been pretty much fine up until now maybe a touch quicker pulling shots. but the adjustment screw needed a hefty turn to get to the correct point though so I expect it recently worked its way to the point where it easily loosened.
Ah, I see. I use Grindz which I reckon has the same effect (loosening of screws). Apparently they don't need to be cleaned that often which is good considering I only do it every 6 months or so. I'm getting some tasty shots now though.
it is, but i hadn't actually cleaned it, it has been about a year since it was last calibrated.
the reason I didn't jump straight to the grinder was it's been pretty much fine up until now maybe a touch quicker pulling shots. but the adjustment screw needed a hefty turn to get to the correct point though so I expect it recently worked its way to the point where it easily loosened.