Warm Damp cotton shirt and then just a wipe with a baby wipe or dry shirt
I like using a damp, soft cloth and softly taking all the dirt out.
i also have these wipes called boogie wipes there meant for babies noses but they work perfect for cleaning ponies eyes and nose!
just a wet rag! it works fine😃
I also prefer natural products. You can easily buy physiological serum and clean the eye with a cotton. I used to take baby wipes before, but I have heard so many bad advices on it that now I prefer natural products.
Water and sponge! Simple but effective :)