On the Safari / Flying Cloud Curtains. Just rinse with clear water after shaking the dust off thoroughly (yes there IS dust in nooks and crannies). Use bottled water if you are camping in the country. Lots of wells are tinged yellow due to iron deposits in the water.
For the Classic... try a new super clean sponge slightly dampened - pat around the water mark itself - don't rub or scrub and use cool water. Use a hair dryer on cool setting to dry the area. If that's successful in a small area, continue. A very very weak solution of oxygen bleach (Oxyclean, but made about 1/4 strength recommended for washing cloths) may be tried in an inconspicuous spot. Again pat it on, then pat dry with a towel, then pat down again with clear water, then pat dry, then use a fan or hairdryer. No bleach is really good for fiber, so you want to stop the action before it goes too far.
In either case ASSUME you DO have a leak. Get a moisture meter and check the floor right at the edge of the wall. You need the kind that will punch through the carpet or vinyl to measure the moisture in the wood. Do it close to the trim, and mark the spot for periodic re-testing (a spot of red nail polish on the trim will do nicely). Catching a leak early can prevent thousands of dollars of floor replacement costs.
Plenty of threads about floor replacement on newer units and about pressure testing and leaks that travel.
Today is a gift, that's why they call it the present.