Per MCDOT: The Montgomery County Department of Transportation (MCDOT) on Monday, April 10, will begin its semi-annual interior washdown to degrease and clean 21 County-owned parking garages in Bethesda, Silver Spring and Wheaton on nights and weekends. The cleanings will start with the Bethesda garages and are scheduled to conclude with the Silver Spring garages on Saturday, June 3. Some garages will experience partial closures during the cleanings, including select entrance/exit areas and ramps. The full schedule of garage cleanings can be viewed here.