The answer to 'window greasy' is that greasy windows are usually caused by a buildup of dirt, grime, and oils from cooking, smoke, or other environmental factors. Symptoms include a cloudy, hazy appearance and a sticky or oily feel to the glass. To solve this problem, you'll need to thoroughly clean the windows using a degreasing solution and elbow grease.
For light grease buildup, you can often clean the windows yourself using a mixture of warm water, dish soap, and white vinegar. Apply the solution to the glass, let it sit for a few minutes, then wipe clean with a microfiber cloth. For tougher grease stains, you may need to use a commercial window cleaning product or a specialized degreaser. If the grease is very heavy or difficult to remove, it's best to call in a professional window cleaning service to ensure the windows are properly cleaned and restored.