Use fresh henna. This is the result of using henna that was very old. I let it set for 30 minutes before knocking off part of it to see. It is clearly weakened with age.
I always suggest using your henna paste within a few weeks of making it. But today, I ran across a really old batch of henna paste. I'm guessing it is at least a year old. So I'm trying it out to see if it is still effective.
