I am pretty sure that I gave Keith the recipe in his other msg thread. But, I am thinking that the recipe you are thinking of is the one in this linked msg.If you have mold @InTheShed recommends a citric acid spray.
Possibly he could give a recommendation?
Hey Shed, I'll be joining the Shed club myself soon.
What do you mix in your spray for mold.
https://www.420magazine.com/community/threads/thrips.512473/page-5#post-5519939