I agree with the cotton ball trick. Soak white vinegar in a cotton ball, then put the cotton ball in the chamber and leave to sit for 24 to 36 hours, rehydrate the cotton as needed.
Two syllables - M80. Just one should do the trick. Take off the stem, put an M80 in the bowl, light it and run away. After it goes off, go find your bowl. It shouldn't be more than 50 yards away. One blast should knock all the bad flavor out.