Several years ago I wanted to clean the curtains in the TT we had at the time. The general consensus was that putting them in the dryer would make them shrink and they would no longer fit.
I was cleaning some upholstery with a Rug Doctor attachment and decided to try using in on the curtains while they were still hanging. They were not as clean as the washer would have done, but they were pretty close.
And there was no problem with shrinkage.
Wayne in Coarsegold near Yosemite
2013 Forest River Solera 24R
2014 Jeep Wrangler Rubicon
ATV trailer for the following toys
2008 Yamaha WR250R,2009 Honda CRF150F
2008 Polaris Scrambler 500