I had severe xerostomia (dry mouth) and dysguesia (distorted taste) for nearly a year and was finally helped by an acupuncturist at NIH (National Institutes of Health). They only did one acupuncture treatment because they worried about too much chemo still in my system but they also taught me a couple of acupressure techniques that I still use.
Just in front of your ears, from you forehead to your jawline, gently massage with up and down strokes for one minute morning and night. Just below your lower lip, center, massage with a single finger in circular motion for one minute twice daily. This stimulates the salivary glands which also helps with the taste problems. I was a skeptic but it helped me. I hope it might help others, as well.
Karen