I also used a humidifier for the first year after treatment, it helped a lot. The oral balance liquid isn't really a spray but a thick liquid, just a little thinner than honey in a squirt bottle. As to the pain and discomfort it can be slow to resolve. I was on very strong pain killers for the bulk of the first year after treatment, of course I had more mucositis than many people who post here, since I went through before IMRT radiation. It can be a slow porcess, but it eventually does get better. Remember the healing timeline that is mentioned here so often... one month for every week of treatment