XyliMelts include cellulose gum to form a gel when mixed with saliva.  This gel coats the mouth to soothe and lubricate it and keep it moisturized.  People with dry mouth want these three benefits.  The gel coats the vocal cords and gives people a feeling of being hoarse or needing to clear their throats.  Because the hoarseness or need for throat clearing is not a response to an infection, which is the usual cause of hoarseness, it is not in any way unhealthy.  Some people do not like the feeling, but it is impossible to get the benefits of a lubricating gel without this drawback.  For most people, the benefits are worth the hoarseness or need for throat clearing.