Hi, I'm Bill Walker and I'm going to show you how to clean metal venetian blinds. You will need, a bucket, clean cloths, dish washing liquid, and a vacuum cleaner with a brush attachment. You can clean blinds inside the window without taking them down. Vacuum the slats with a vacuum cleaner. Now, put some soap in water in a bucket. Take the cloth and wash the slats with mild soapy water. Empty the soapy water, fill the bucket with clean water. Now, using a different cloth, rinse off the slats with the clean water. And that is how you clean metal venetian blinds.