If after working with quick-drying putty or mastic trowel is not immediately clear, next time will have to work hard in removing the blades with the dried up crust. Convenient and quick to clean will help a simple device —a tin with a few longitudinal grooves. Their width should be slightly greater than the thickness of the tool. A little perekaziv blade, extending it through the gap, scraping thus the unused material from both sides.