1. It can be easily removed with daily cleaning. A simple method is to wipe the eyes with a warm towel every day. Alternatively, gently dab the eyes with a cotton ball or gauze dipped in warm water to soften the secretions, then gently wipe them away with a wrung-out cotton ball.
2. If warm water doesn't work, another method is to dissolve a large spoonful of boric acid powder in a teacup of boiling water. Stir well. Buy a small container and put a cotton pad inside. Pour the solution onto the cotton pad and then slowly pour off the excess. Seal the container. Then, use one of these cotton pads daily to bleach, remove tears, and prevent tear stains from accumulating. Remember to change the cotton pads weekly to prevent bacterial growth and infection from prolonged storage.
3. For stubborn stains already present on a cat's face, you can use a mixture of equal parts starch and boric acid powder as described above to remove them; first, mix it with water to form a paste. Carefully apply the paste to the stain and let it air dry. Once dry, brush it off and wipe it clean. Be careful not to get the powder in its eyes. These powder particles may cause eye ulcers if they get into the eyes. Boric acid powder is not hard to find and can be purchased at most pharmacies.
4. Cats often have discharge in their eyes. If left untreated, this can form "tear ducts" around the eyes and sometimes even change the coat color. Therefore, it's important to clean them regularly, but never use human eye drops on your cat. Cats' eyes are very sensitive, and you shouldn't use human eye drops just because they have eye discharge. Also, boric acid solution can cause inflammation, so use it with caution. If, in addition to eye discharge, there are other symptoms such as fever, loss of appetite, and lethargy, the cat may be sick and needs to be taken to the vet immediately. Furthermore, if there is so much eye discharge that the cat can barely open its eyes, it's also essential to take it to the vet as soon as possible.
