This worked so well I have to share. We took in 5 kittens and a mama cat, two of which continue to suffer from a cold. They have been with us since 3/21. Two of them have started a second 14 day course of antibiotics. One of them has such clogged nasals that I have been trying to use a bulb syringe to suction it off but it only helped a little. She was so miserable. I remembered taking my kids to the beach when possible to relieve congestion after colds. It always worked like a charm. They play in the salty air and I had tissues handy to swab away what poured out. Sooo I put a very large bowl with a few inches(nowhere near even half full) of salted water in the microwave for two minutes. Opened the door layed a towel down and stuck the kittens head inside the sweaty microwave. She was very curious and even walked around the bowl in the micro looking around. I stayed with her to ensure she did not get too close to the hot water in the bowl. After about three different times of reheating the water and then opening the door to stir it while she walked around in the micro, both of our noses where running. I'm not even sick. She's doing much better. I will retreat as needed. Hope this helps someone else.