I bought a new set of pans several years ago. The knob on my favourite pan lid was getting a bit wobbly so I took a screwdriver to it today and it was full of dry, papery gunk. I'm assuming it's the starch residue from years' worth of rice and pasta. Yuck. All three pans were the same, to varying degrees.
I usually just stick them in the dishwasher but it occurred to me that maybe I'm a slattern and everyone else unscrews their knobs on the regular. What's your norm?