I use Tide - the one that's free of dyes & perfumes. It doesn't get the armpit smell out. I'm not sure - maybe it would if I rubbed some on the areas in question. If they come out still smelling, sometimes I put my jerseys & running tops in with another load afterward, for a second go-around. I do find that if I spray Nature's Miracle (the stuff for neutralizing pet odors & stains) on the underarms first, it does work. I did that yesterday with 2 jerseys that really stank, and they came out great. Sometimes I add baking soda to the load - I think it helps.

My Mom gave me a bottle of Penguin Sportwash a couple of years ago. I couldn't see that it was much better than regular detergent. Definitely not worth the cost (to me).

I think that my armpits are especially problematic. Maybe it's my diet? Age related? I don't know. I hate it. DH's workout clothes NEVER smell. Mine smell 5 minutes after I put them on (the synthetic ones, anyway).