Deodorant stains

[Munkichops]

hi all,

Could you help with any tips to get rid of deodorant stains on tshirts. SOme of mine have gone hard under the armpits from deodorant, not sure whats best to get shot of it without ruining my clothes?

Apparently one of the best thinks ever is oxiclean - it's not sold in U.K. anymore but is easily bought on places like Amazon.

Some videos on YouTube about it.

I'm sure Vanish and the like are the same.

*things!!