I’ve seen some artists put Vaseline on their brushes when stored.
I noticed on some brushes get sort of rubbery after cleaning with walnut oil and wiping and leaving them for a few weeks.
I cleaned them again in walnut oil and they are ok but I’m sure if I had left them longer they would have gotten pretty stiff.
When working in a painting I just wipe my brush clean, dip it in walnut oil and wipe it.
Other brushes that I don’t use often I’ve cleaned with gamsol and wiped them dry.
Any thoughts on these methods?