I don't know what granny has been smoking, but most of what she wrote is wrong.
Misting the entire plant may work better, but otherwise be patient, it can take quite a while when only doing a branch or two, but it will happen eventually.
Make sure to use the pollen on a seperate plant to avoid "inbreeding" which can cause (bad) recessive genes to recombine and become dominant, leading to inferior plants.
Also, it is NOT SAFE to consume any plants that have been treated with colloidal silver!!!!!
They MUST be sacrificed for seed or pollen production ONLY.