Just rinse your mouth out with plain water right after. I carry 1 bottle of 2-3x concentrated sugar/electrolyte mix and 1 bottle of water. I always followup the mix bottle with water. Then continue to dilute the mix bottle whenever you need to stop for water on longer rides. Usually by the end of a 4+ hour ride both bottles are just water and I supplement with real food I'm carrying along with sugary snacks and/or gels