According to an investigation..
Calamansi is very effective in removing stain.
I already prove it by doing or using calamansi as a stain remover. and it doesnt disappoint me. It really is working. I do this because I dont have time to buy detergent in the store and it helps not to spend more money..
I hope you use it too, and hope that this helps you a lot..
Thanks and God Bless