...At least Seventh Generation's Lemongrass and Clementine Zest dish liquid does. We bought some for the house and I guess we had it for about 3 months or so, and it started to turn brown. I didn't think anything of it, and then started noticing that the sink stank more than it usually does when it's full of dirty dishes. When I used the liquid I noticed that the smell was getting a little sharper...and finally, it was just plain rank. I started to use it this afternoon, realized that the ever-present stench in our sink was indeed coming from the bottle of dish liquid, and when I opened up the top, discovered that a fine patina of mold had coated the ENTIRE inside of the container. Out you go!
So, until I can get a bottle of the Lavender Floral and Mint (which did not seem to go bad), we're using the Dawn Dish detergent I was reserving for oil-based stains on clothing and really, really greasy dishes. I posted about Dawn here.