I have used this product once and it has been great on the moss & algae. It hasn't removed the lichen, however, in fairness, there is a lot of years build up so I will reapply. The bottle does state that a second application may be needed, so can't fault the product.
I have been smitten by the Billionaire Bachelors series; hot, sexy, kind guys....who wouldn't be! I love the style of Melody's writing so have read many of her books. This series certainly didn't disappoint