Heres the fix I did on one of mine in August. No sign of leaks. Pretty much use it daily.
The fix I did was to clean it all out with isopropyl and let dry.
Install a non squonk atty.
Pull out the pin that is the point of the leak and clean and dry out inside.
Apply loctite to the pin and a bit inside and reinsert pin.
Remove atty.
Place an O ring inside the 510 connector, 6mm or 7mm, maybe it was a drip tip O ring? I cant remember.
The next step isnt in the yt vid and probably an overkill
Then I covered the circuit board with a potting compound...or you could use a non acidic silicon, maybe?