If you have a home depot close, go to the isle that has the cleaning stuff, mops,brooms, etc...They have a bottle brush there that will easily bend to any shape you want, its about 30 inches long...fits in bottles and carboys.
I haven't heard of that, but with a yard full of sand, it makes perfect sense.Thanks for the great tip!
I will probably use Oxyclean instead of ammonia though. It's a mildew killer. Also works like a dream on red wine stains.
(not a paid company spokesman)