Whats the best way to clean wooden shades (Vertical shades)?

Question

A friend suggested taking them down and hanging them outside and just hosing them off with soap and water. Guess what, I did. I didn't work. Slat by slat with a sponge? Any Ideas? Thank you

Answer 1

Murphy's oil soap, mixed with water is designed for wood. And yes,  slat by slat with a sponge is the only way to be sure they are clean..