I have another good idea,I tried,it's effective.
First,make sure a big sun in the sky that day.
Secondly,daub white soap on your white shirt,special on collapsible and cuff.
Then,put your daubed shirt in a transparent polybag.
The important step,put the polybag under the strong sunlight,about 30-60 minutes.
Last,take out the tepid shirt from polybag,wash it to clean.
That's all.Have a try now *^_^*
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Novice
