how to clean ceiling tile grid
Wipe the ceiling grid with a damp sponge or rag. If there is a lot of accumulated grime, use a non-residue cleaner and rinse the grid with a damp sponge afterward. Let the grid dry before proceeding. Ventilate the room as much as possible. Open windows and use fans to draw paint fumes out the windows.
Acoustical Ceilings. Spectrum ceiling cleaner mixture should be sprayed lightly on surface, making sure it is uniformly covered. In an hour or so, your ceiling will be clean and brighter. This ceiling cleaning mixture is the key - you do not touch the surface, especially the textured type, or tiles.