My 7.5 Year Old Son Has Been Snoring Again, I

My 7.5 year old son has been snoring again, I assume it is enlarged adenoids as he had the same issue two years ago. He was scheduled for surgery to remove adenoids, but as we were waiting for his surgery, he stopped snoring, and we felt he did not need surgery anymore.I have heard that steam may help, what else can I do? I want to avoid surgery