Once you have bought the best otf knife out there, your main priority would end up becoming trying to look into making sure that it lasts as long as possible. Some people often don’t even use their OTF knives thinking that this would reduce their life expectancy, but this is fairly counterproductive so it’s not the sort of thing that you should try to look into in terms of preserving your new knife. There are much more proactive techniques that you can use which would contribute greatly to the duration of time that you would be able to actively use your OTF knife.
One thing that you should at the very least try to do at some point is to lubricate your knife. This is actually the sort of thing that should be done at least a few times a year if not every single month, and true knife fanatics find themselves looking into this sort of thing up to once a week as well.
This can help rust from collecting on the knife, and if there is one thing that would ruin your knife before you even realized what was happening, it would be rust. Cleaning your knife out every so often is also useful, but just make sure that you lubricate after the cleaning is done otherwise even a single drop of water can cause a lot of damage. Regular knife maintenance is an essential aspect of giving yourself the chance to properly enjoy your knife and have it be fully effective whenever you end up needing it. It can also help you boost the resale value of your knife since people would be more willing to buy it.