Jeanie, I did a 'Google' on the subject and it brought up a video and instructions as well. So you might want to try that. Moss grows back here, not mold as far as i know which is not too far.
OK, you have me on pins and needles wondering what your good news is...cannot wait to find out. I consider myself a border child...we lived in Iowa....bred and born there...educated in Missouri and retired almost on the border...I guess I am returning to childhood days! Crossed that state line many a time as a child and it all looked the same to me. In fact, the Honey Dew war was fought over where the border should be. And we live not far from "Skillet Fry' according to a classmate, but it no longer exists. Some towns in Iowa has faded away also.