With both my kitties, i clean the discharges found at the nose and eyes areas with a moistened (*warm water) q-tip several times a day.
They are both white in color. So, it is hard to "camouflage" dirt.
i use "sno sho" shampoo to bathe them, and it helps to remove any stains on their bodies, if any. i think it is vital to remove any stains on your kitty rightaway.
i think it helps to groom your kitty on a regular basis. Just my thought!
Take care! <3