I've been using a variety on cloth nappies in my four month old for a couple of months, and I've noticed that occasionally there's a bit of a smell of ammonia (mainly after an overnight, so not a huge surprise).
I wash at 60C with only a small amount of washing liquid, and dry over an airer. I'm wondering whether I 'need' an ammonia bouncer product, or whether that's a cunning ruse to persuade me to part with money? The fact that a search for this on here comes up with nothing makes me think the latter.