Best way to remove sweat odor from running shoes?

Put them in the freezer. The smell is bacteria. The bacteria will die when frozen. Going forward, be sure to air out your shoes after sweaty runs and put newspaper inside them to soak up moisture.

You can put baking soda or baby powder in them.

this is what I use. Works wonders

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I live where it's extremely hot and humid so my shoes get coated with sweat daily. Once per week I hand wash my running shoes in a bucket of hot water, dawn dish soap and a 2-3 oz scoop of borax.

It works surprisingly well. Borax is the key.

Vinegar is what you need. I crossed a stream in one race, forgot about it (spikes were almost dry) and my spikes smelled bad. I sprayed them with vinegar, then put newspaper to dry them out, and they were better

Shīt in them

Put the outside in sunlight after your runs. Seem to work.

Boot dryer (can find them on Amazon and brick and mortar) to get them dry right after the run. Makes a huge difference (as we learned from soccer shoes and hockey skates).

Putting them in cold temperatures would seem to break the foam down?

Yep, the sun.

For this approach, you will need...

Two laundry delicates bag big enough for one shoe each

One Gallon OdoBan (get at Home Depot... $11)

One gallon white vinegar... $4

Regular laundry detergent

Remove inserts. Put each shoe in a separate delicates bag. Put delicates bags and inserts into washer.

Set to warm. Add detergent, 4 oz of OdoBan, 4 oz of white vinegar.

Wash separately from other clothes.

Air dry. DO NOT PUT IN DRYER. The heat will separate the glue holding the shoe together.

The OdoBan and white vinegar should last 1-2 years, since you won't need to wash your shoes much in fall, winter, and spring. OdoBan is the cleaner that nursing homes use to clean soiled nightgowns and sheets. It works great.

I've been doing this for 20 years... never had a problem. I spray the shoes with Shout first so they come out looking like new.

Air them out outside if you can.

If that doesn't help, throw them in the washing machine.

My garage gets hot and dry. so I usually leave sweaty shoes there. they dry out overnight. When rain soaked shoes occur, I also stuff them with newspapers.

Going forward, wear socks when you run (if you haven't been).

Over my years (decades) of coaching, the students whose shoes were banned (by their teammates) from the locker room were the students who ran sockless.

I sprinkled laundry detergent on and in them and put them outside in a rainstorm. I left them there as the sun returned until they were dry.

The sun, in addition to helping with the smell, also returned a nice snug fit.

You start to notice these running shoes take a life of their own after just a few weeks into the season of those that choose to run without socks.