Finn Conway, 21, has gone from being told he "wasn't going to go anywhere" to running a thriving exterior cleaning business, tackling jobs worth up to $4,500. Advertisement AdvertisementAdvertisement Advertisement"I was never academic, I was often told I wasn't going to go anywhere," Finn told Yahoo News. He said mildew, algae and moss are among the biggest problems found on Australian homes, particularly on cladding, brickwork and shaded areas that receive little sunlight. While many DIYers rely solely on water, Finn said professional cleaning products help remove mould while slowing its return. Source: SuppliedHis biggest piece of advice is to stay on top of garden and roof maintenance before problems develop.