Nycil talc is not a good prickly heat powder. The cooling sensation lasts just for 5-10minutes then it is just powder over your skin. The nycil powder doesnt contain any anti-fungal drug that will act against the fungal bacteria residing over your skin.
In the summer seasons many bacteria grow up on your skin leading to rashes, skin allergy, etc. Nycil is totally inefective against those bacteria and use of this powder wont affect on it. I had a skin rash a while ago, I thought using this I will get rid of the rash as tje advertisement shows how it works but in reality you wont get the same result as they show.
Instead of using this please opt for other options such as himalaya and candid, they definitely will help you in this summer season.