if I use a carpet cleaner and a sponge will they warp?
Hi Janna, here's some info. Though it doesn't address vertical blinds the advice should apply. There are also some voutube videos with similar advice about vertical blinds, you could look at them as well.
I actually soaked my vertical blinds with a little Simple Green in the tub. Rinsed and set outside in the sun to dry.
Do you know what the fabric is covering?
looks like plastic