Boon have my sympathy , can't have a snack after feeding your fish, open a bottled drink, Adult or otherwise and you can smell dead fish with every swig ! After 4 (?? I believe 4 years of hand feeding??) years of hand feeding and fighting with oily fingers and "Flavor Crystals" ( 1st year was the TSC Cheap stuff, not catfish but supposedly Game Fish ) , can assure you Optimal definitely sticks to fingers best by far , hands down (Pun intended) . Certainly hope Optimal sticks to Fish ribs as well as it does Human fingers. Finally realized I needed one time use vinyl gloves (all of my leather gloves started stinking like dead fish ) , Boon , Feed fish , remove vinyl glove and enjoy snacks , wife doesn't complain of dead fish smell when you get home. Side benefit , Trick or Treaters don't complain of smell of Dead Fish candy , if you remove vinyl glove , before handing out candies.