Help for Kitty with Stuffy Nose

Wallingford's nose is so stuffy that he is breathing through his mouth! He went to the Vet early this morning and has liquid antibiotic and the Vet checked his chest out thoroughly and he is not congested and he wasn't running a fever. I feel so sorry for him. I can tell where he is in the house by his sneezing. He is still eating and doing everything else normally. Anyone have any home remedies for kitty stuffy nose? (There is no discharge from his nose and a little wetness seeping from one eye.)