Depends on how much interest you have in addressing the issue and whether you like tinkering.
Here's what I would do in the order of difficulty:
1. Put a drop of your favorite lubricant in the pivot area. Just a single drop. Then open and close the knife a couple of times and see if that helps.
2. Adjust the pivot tension.
- This will require you to have the correct torx driver bit for the knife. I went to a big box store and bought the cheapest set I could find. Make sure you get a set because if you need to disassemble the entire knife, it will probably need multiple size drivers.
- Many people recommend getting Wiha drivers, but they are pricey.
- there may be loctite in the pivot, refer to a disassembly video.
- careful not to strip the screws, I'm not sure how easy it would be for you to get extras from that specific manufacturer.
3. Wash the knife in soap and water, and dry it out completely. Then repeat steps 1 and 2.
4. Use your Google machine and search for "Ruike p801 disassembly" and look at the videos.
5. Disassemble the knife, make sure that none of the bearings are siezed, make sure all of the surfaces are smooth, then reinstall, putting a drop of lubricant on the bearings and the detent hole.
Ideally you can do step one and be done with it. Realistically steps 1 and 2 should solve your problem.
Have fun!
