Stopped working?.....clean your bowl piece!!!!
The only thing that would make mine stop working would be a clogged diffuser(stem piece thats in the base water, 16 small holes instead of one big hole. ). Those can clog pretty easily. I have an ashcatcher so its not bad. Oh, and if you're not smoking out of a diffused bong, YOU NEED TO!!!
Broken bongs, ahhh, I've heard and seen some tragic stories. Some bongs of friends that I was sad to see break. 4 foot PHX Tetra biting the dust after 3 months, so sad. A legendary(very sentamental) Faded shattering its base. Bubble bottom PHX Trinity, another shattered base. The one I have(PHX Trinity beaker bottom 20") has somehow stayed alive for three years, with too many close calls to count. Its been dropped, kicked over(salvia attack, person almost got stabbed for that shit), put down way too hard, smacked against walls....This thing has been so durable for almost four years. Highly recommend this one. Plus, it trucks the shit out of you. This may sound kinda crazy, but this thing turns dirt shit middies into KB. It seriously is that good. Headies or kief rips out this piece and you're going nighty night. Cant beat the percolators!!!!!