You get some 100 proof vodka and you take a shot glass full. And you swish it it around in your mouth for a minute and then swallow that and then swish the rest around for a minute and swallow that. breathe in through your mouth and out through your nose while doing it, in between gulps.. and that'll surely clear your sinuses in a heartbeat.

keep a box of tissues handy because it can get messy when your sinuses drain quickly.

amazing how wonderful you'll feel the next day.

Mullein is an herb that's good for congestion too. but vodka is much quicker.