Cornflour - Why does it work?

Every time my kids have a red, blistery bottom rash I always use cornflour & it always clears the rash up within 24 hours if not earlier. It is also a great preventative. But I can't work out why.

I have tried to look to see if cornflour has anti-fungal/anti-inflammatory properties and I get two different answers on the internet. The baby answer - on baby sites is that cornflour feeds thrush or fungus so don't use it or your child might get thrush or it might get worse. But I can't find any proof of this on the net.

The science answer is that cornflour is used as an anti-fungal in gardening & crop soil preparation. It also has anti viral & anti bacterial properties. One naturl health site claimed that purple cornflour has anti-inflammatory properties but I couldn't find that for the white stuff. All their articles use big scientific terms & diagrams & are quite hard to read but seem to be research based.

So what's the story? I know it works better than any cream I've ever tried at a fraction of the cost but I a being told it doesn't work & will make my problem worse. But I can't find research to support this only research to support (in a very round about way) that it does work.

Can anyone point me to research that proves why I shouldn't use it?