Pots can loosen up with use, so if you use some more than others, they may become looser over time. This isn’t a fault. There’s a friction bearing that gives the pot most of its turning resistance, it has no bearing on the operation (wiper/resistance element) of the pot.
Look at all the posts about loose/wobbly pots on the OB-6. The Take 5’s pots are much stiffer by comparison.