So glad I found this thread my gun started leaking a few days ago, a few trickles at first now it literally sloshes out, I'm wasting nearly as much as I'm using.
Tried a quick fix using a rubber seal from an ikea jar (no good) tried to 'fatten' up the original seal by steaming it (didn't work!) so now I spend about 15 minutes before a client comes trying and hoping the
cup is on straight and tight enough. Have had a quick look online for replacements with no luck.
Will be very interested for any advice as it looks terribly unprofessional and also wastes a lot of precious solution!