Hi, Anybody know where in the Phoenix area I can buy Goodwin's Lemon Fresh Ammonia (Biodegradable Formula) Complete Cleaner. I bought it a long time ago but now I don't know if it is available. My kitchen sink is clogged with white solidified chunks and this ages-old ammonia was able to partially dissolve with a small amount a small chunk I put in a container for about a week before drying up. If not, any suggestion for an alternative cleaner/opener? Thanks!