I need some help with some home remedies. My youngest is ...

I need some help with some home remedies. My youngest is prone to ear infections so having a bunged up nose is not a good thing for him. For the last week and a half, he has had both a runny nose as well as a blocked one. It has now turned into a chesty cough. My problem is, the medicine isn't working, so I thought maybe someone might have a more effective remedy for him. Now bare in mind, he's only 7 years old so alcohol isn't an option.

This desperate mum would definitely appreciate your input.