The improvement was gradual and steady, but I was using warm compresses (hot tap water on a washcloth) as well as the ACV described above. My chalazion has been gone for some time now. If I touch the outside area of my eyelid, sometimes I think I can feel a very, very tiny bump, the size of a pinhead perhaps, but it has never swelled again. I would not hesitate to use the ACV full strength and warm compresses again. I would like to add, that it is my chalazion was caused by using old mascara, the kind in a tube with a brush. I knew better than to use old mascara as bacteria will build up in it.