Hi
I Have been using cystal salt after bath. I wet the salt and apply on my arm pit. It help to control the odour. Salt is antibacterial. and it is natural. My friend used to use those and after I introduce her to the salt, she swear that it is better.
You may try getting in Sasa (a cosmetic shop, there is one in Bugis Junction). I do not know whether they still sell it. I saw it many months ago.
Apparently, I heard someone mention after using this cystal salt for 3 months, the odour is not that bad. U have to use twice a day. Instead of masking with a lot perfumewhich made is worse.
Last time I used to get it whenever any one goes to Australia. I brought my in Watson in Year 2004. Watson does not carry it anymore, cos my is finishing soon.