If you’re like most homeowners, window cleaning is easy to put off—until it’s impossible to ignore. But dirty windows don’t just affect how your home looks—they can impact natural light, curb appeal, and even the lifespan of your glass. So how do you know when it’s time to call in the professionals? Here are 5 clear signs it’s time to have your windows professionally cleaned , especially for homeowners in Southeast Michigan. 1. Your Windows Look Streaky No Matter What You Do