Clue | Source | Date |
---|---|---|
Machine often used to clean the exterior of stone buildings | The Times Specialist Sunday | 02 Dec 2018 |
Loud building-surface cleaner | Newsday | 14 Jun 2017 |
Compressed-air tool | USA Today | 23 Nov 2015 |
Surface-cleaning tool | The Times Concise | 13 Jan 2015 |
Compressed-air tool | ||
One for whom silicosis is an occupational hazard | ||
Paper tool? |