I hate it when you wash a dark shirt and afterwards you can still see the deodorant stains. It is like the shirt didn't get the memo that you washed it?! So frustrating! The good news is that I found a super easy way to remove it.
All you need is OxiClean and some warm water.
First, add a scoop of OxiClean to your bowl of warm water.
Stir it until dissolved (or until mostly dissolved).
Add the stained shirt soaking the part of the shirt with the stain.
Let it soak for several hours.
Finally, wash and dry the shirt as you normally would.
And voila! The deodorant stain is gone!