S.P.
Here is a tip for cleaning blinds.
Put warm water and a little liquid detergent in the bathtub.
Take down blinds one section at a time and dip and swish them around in the tub.
If they are grimy, use a soft brush to scrub lightly.
You can rinse them under a spray or shower, shake off excess water, and hang to drip dry.
Maybe do one room at a time, or one window a day until all are clean.
I put a little ammonia in the water to cut the dirt.