Here’s a very cheap body deodorant, particularly effective in the tropics where it is a massive problem.
After you have a shower at night, use extra virgin coconut oil as an all over body moisturiser.  If you don’t want to smell like a coconut, add some essential oils of your choice (rose, peppermint, lavender) – around a small bottle of essential oil to a litre. Do this after every shower.
At first, you may need to shower a few times a day if the weather is really hot.  Don’t put on so much that you are oily but rub it in, or get a pal to rub it in for you!  After a few days, you will notice a massive difference.

You can also just use this as an underarm and foot deodorant. A jar purchased from the supermarket or health food store will last for years so it is very cost effective, and having no aluminium in it is a great benefit.

It really works!