First, build a quick pressure test rig: https://www.youtube.com/watch?v=qBZbLdotrG0 Second, buy some silicon grease: amazon.com/Waterproof-Silicone-Lubricant-Plumbers-Sealant/dp/B0BN82TPY4/ref=sr_1_3?dib=eyJ2IjoiMSJ9.RWY-6RGHlnSetDygoSArLzyAGiMqyjWUlhpRMYdYVJYQIFlAB5U5edKJ7vZPpob6AilErG_DHTVGfo2IFVZ0p9H9iJhPFhSrKpSy7xnmuqnYfhagYHPQk8V_eNOBF1NQ56xQtoNiOy9Rd96_VKyulLFg6u2dO1lSdOblnq6hZdDS31fTj25pZMGUzaXh_vrRLqPyh59JMnb0bZK2R9X0b_yzz0KaGQqi7oVD6rAesXE.TT1IsojE1NuHbZzFZRduakFTifkiQwEgoSQ58wBN3fU&dib_tag=se&keywords=silicone+grease&qid=1782581416&sr=8-3 Third, remove the caseback and grease the o-ring, release the stem and grease the o-ring on the crown, then re-test for leaks. And you probably need to do that each year, no more than two, even for gens.
To this point--food safe silicon grease. This is the stuff I use: https://www.amazon.com/dp/B0BN82TPY4 I small toothpick amount is really all you need.
amazon.com/dp/B0BN82TPY4 $8 All the silicone grease you'll need for the rest of your life. 🤭
