This has been quite a mystery for me for several years, and I have tried multiple products along the way, but still once I’m sweating then my cycling clothes stink.
Some of the things that I was trying (scented detergent, oxy-clean, fabric softeners, drier sheets) always seemed to be only temporary masks and the ammonium odor used to come back. Usually what I notice the most is my gloves when I wiped sweat from my brow.
Cause: Ammonium odor usually means that you are burning muscle, which is caused by a lack of glycogen (sugar) to use as fuel. This often happens when you are riding at intense heart rate for extended period of time – like a fast group.
What we have found is that if you wash your cycling gear with hot water – Double Rinse them and do NOT use any fragrant products & NO clothes softeners. They are merely a temporary mask & as soon as you start sweating again, the softeners attract the scent molecules and attach to them. This causes the odor to stick around longer.
Any other helpful tips, just throw in a comment below, Thanks!!