8 experts deep clean decades of household grime

Eight professionals walk us through how they deep clean hard-to-reach and often overlooked areas around the house. These challenging projects often require specialized skills due to the accumulation of grime over time — think clearing out an air vent that hasn't been touched in almost half a century or restoring a roof that's been neglected for nearly three decades. These specialists prove that some things, like excavating sewage pipes, are best left to the professionals.