Review on Camco 40246 TST Drain Valve Lube with Coco Oil - 16 oz: Enhanced Lubrication for Efficient Drain Valve Performance by Tim Hull

I have 4 storage tanks on my van and one of them has a sticky valve. I put the recommended amount of this drain valve grease in before winter and then left it in the reservoir until summer. Unfortunately after camping last weekend the stuck valve on the tank is still not working (I didn't notice any difference). I gave the product 3 stars just to be fair because I don't really know what is causing the valve to stick. Perhaps the problem is with the hardware (like something stuck in the valve) and not something that can be solved with lubrication. I've re-entered the recommended amount and will update this review again in the fall after another hike if it helps with the second app.