"Cotton buds" refers to small sticks with a ball of cotton on each end. They are used for cleaning or applying things to delicate areas, like the ears or skin. Full definition
Also avoid poking around with cotton buds in the ear, you will only work any wax and debris further in and potentially damage the ear drum. (vetbabble.com)
Grab some cotton wool or specially designed cotton buds for dogs and wipe the folds at the entrance to the ear canal and outer ear until it looks clean. (dogsbarn.com)
Never push cotton buds deep into the ear canal. (terrificpets.com)