This tutorial demonstrates how to remove the O-Ring from the lid, clean it, lubricate it and return it to service.
Use a flat screw drive or flat stick to remove the O-Ring. Be careful not to cut it.
Apply a generous amount of Petroleum Jelly – “Vaseline”. Spread completely around the O-Ring. DO NOT USE GREASE, only Petroleum Jelly.
If your lid is very dirty and needs cleaning – check our tutorial on cleaning the lid.
Our products are used in scientific research and agricultural applications for accurate measurement of plant water potential.