Ok moms I have a question that might sound really stupid with me have 4 kids but my 4 months old is…

Ok moms I have a question that might sound really stupid with me have 4 kids but my 4 months old is sick. Very congested I've put this Vapor Rub stuff on her her back her chest and her feet and she still congested I don't have a shower so I can't go do that is there anything else I can do to help her sleep?