HELPFUL HOUSECLEANING HINTS... Windows: Layers of dirty film on windows and screens provide a helpful filter against harmful and aging rays from the sun. Call it an SPF factor of 15 and leave it alone. Cobwebs: Artfully draped over lampshades reduce the glare from the bulb,thereby creating a romantic atmosphere. If someone points out that the light fixtures need dusting, simply look confused and exclaim "What? And spoil the mood?" (Or just throw glitter on them & call them holiday decorations.) &nb sp; Pet Hair: Explain the mound of pet hair brushed up against the doorways by ...