If you find that the white deodorant stains from your clothing are not getting removed in the laundry, simply turn your shirts inside out before washing. This will allow the agitation of the washing machine to easily life the white stains from the underarms.
Be sure to check for any stains on the outside of the shirt or dress before washing first, as you may need to wash some things twice if there is also a major stain on the outside. You should wash the outside first, then turn inside out and wash again in the next load of laundry.
Do you need to remove deodorant stains from something you are needing to wear immediately? Click here for quickie deororant stain removal tips.