I should spray him with windex?
Anything with ammonia will hel relieve the stinging sensation where the stinger(s) entered the skin. Keep the ammonia away from his eyes! As other FReepers have stated, urine also has ammonia and can be used as a field expedient. If the stings don’t appear to be too painful for him, just some baking soda and water paste should bring relief.
Windex has ammonia.
Ammonia is good for wasp stings.
Getting stung by bees and wasps was part of growing up here in Panama.
My mother always had a bottle of ammonia at the ready.