How to Treat a Kitten or Cat at Home for Nasal Congestion May 17, 2024 17:09:03 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by schwartzie on May 17, 2024 17:09:03 GMT -5 To make a sinus rinse, or nasal irrigation solution, follow these steps:mix together 3 tsp of salt and 1 tsp of baking sodaadd 1 tsp of this mixture into 1 cup of water and stir until the solids have dissolvedSince it's for a small cat, I just use 1/2 tsp and 1/2 cup of water.