Navel lint, also called belly button lint, If you're Wondering about lint, that's what we call those bits of fibre and dust that accumulate in our clothes. The materials of which our clothing is made of, such as cotton and wool, consist of many tiny fibres weave together.
You may have noticed that cloth items that you use i,e shirt, bath towel or any cloth's becomes thinner after a constant wash. You may have also noticed that the lint collector in your dryer collects these fibres every time.
Beyond all this clothes lint is accumulated in belly button because two reasons:-
First, the hairs found have tiny scales that act a bit like hooks that latch onto shirt fibres and pieces of lint.
Secondly, the hairs tend to grow in circular patterns around the belly button, leading to the collection of lint to that area.
To clean the lint that gets accumulated is the only one way that's cleaning it daily with soft cloth or tissue paper at the time of bath or after bath.