Re: Hookah Clean? or just too old?
It's a bad habit of mine, but I leave my QT and Red Syrian un cleaned a while - I tend to simply smoke of the others and when all dirty, clean all of them in one sitting.
Try a deep cleaning with brushes, warm lemon juice and baking soda. If they are still acting up (tasting funny) afterwards, then you might have an issue.
PS: Don't forget to clean the heart if you can - get some pipe cleaners and use them to reach inside and try to scrub everything you can access. Good Luck.