Over the years, I’ve tried a lot of different methods for cleaning dirty window blinds. In my experience, you have to really want to have spotless blinds to bother even attempting this, because blind washing isn’t a lot of fun. It takes time and elbow grease. I have found two methods that work well.
You need a bathtub for method one. If you don’t have a bathtub, skip to method two. Also remember these methods are for vinyl or metal blinds only. If you are cleaning vertical blinds, the slats can usually be removed from the headrail for cleaning.
Put some warm water and all-purpose cleaner in a bathtub and immerse the blind in the water. Kneel beside the tub (you may want a towel under your knees) and, using a scrub brush, rag, or sponge, scrub several slats at a time until they are all clean. Reverse the slats or flip the blind over and repeat the process on the other side.
Drain the soapy water and replace with clean water to rinse the blind. Carefully wrap the blind in a towel to catch dripping water, and take it outside. Drape the blind over a railing or hang it up somewhere else to dry. You can hang it in the shower to dry if you can’t take it outside. Wherever you hang it, bear in mind that it will drip water for a while.
Take the blind outside and find a clean place to lay it down, or place a tarp or some plastic sheeting on the ground and lay the blind on top. Spray all-purpose cleaner on the blind, then, using a long-handled brush, kneel or squat beside the blind and scrub the slats, working in sections.
When you finish one side, turn it over and repeat the procedure. Then take a hose or bucket of water and rinse the blind until all the crud and soap is gone. Hang the blind from a railing or clothesline or tree branch until it is dry.
Either procedure is time-consuming and tedious. The only consolation I can offer is that blinds always look really good afterward.
Want more house cleaning tips and ideas? Check out my book Clean Like A Pro: Tips and Techniques for Cleaning Your Home Like a Seasoned Professional, available on Amazon.