I`ve got an old dear who rings me every month and says moss/algae is forming on her path,whats the best thing to spray on it to keep it at bay,it`s only slight but she is burning my head out,i had to keybond it twice for her as she must of went round it on her hands and knees and found 3 soft joints,ha ha,they were over 5mm on the curves in the block,i keep telling her to keep brushing it as her neighbour cuts the front lawn once a week,she thinks a cleaning comes with full maintenance,i`ve seen a liquid called patio magic and might buy her some to either put on the path or stick in her tea,ha ha,think she`s just lonely and feel sorry for her,sprayed it again with pathclear,it came up superb when i cleaned,the only headache since starting up in april.Thanks Dan