Cleaned the window blinds
All the window blinds on our 99 U270 looked dingy, were marked and possibly had nicotine stains. We did not want to buy blinds if we could salvage the ones we have. We did not remove any of the day night blinds and cleaned them in place.
Spent about a half an hour on each window using a borrowed Bessel shampoo steamer vacuum with the hand wand and a very weak carpet cleaning solution in the reservoir, much less than the directions asked for.
The magic was spraying on "Folex" carpet and stain cleaner (30 oz, $5.95 at Lowe's) (recommended by someone on the forum months ago - thank you) it was amazing, used a full bottle between all the day and night shades.
On the "day shears" we used Folex and on the bad nicotine or yellowed areas also used ammonia based Windex, a nail brush to scrub the stains.
Used lots of water from the spray wand and sucked it dry.
Even did the front windshield blinds (these we did not scrub used the FOLEX with lots of water and sucked dry.
They are all dry now and look like brand new, it's amazing, even the front ones cleaned up, we had to take them off and lay them down and do them on a flat surface.
This was one of the most rewarding projects!