Slice of fresh ginger, slice of fresh citrus (orange/lemon/lime), small amount of honey (depending on tartness of citrus). Pour on boiling water, allow to steep, fish out the ginger, drink.

You can add a shot of whisky if desired.

I find this a really good catarrh buster.

You can also get lemon and ginger teabags too which I also like, whether I have a cold or not, but they are not as strong or as effective.

FF