Don’t panic — those aren’t permanent. Wet latex changes it’s color and therefore, in most cases, you need simply to further let it dry. If they are still there, they might be mineral spots from water or residue from soap or talc. Here’s how to fix it:

• Wipe gently with a clean towel
• Use a touch of silicone oil to remove the dullness
• Avoid air-drying latex in sunlight or over radiators — heat + water = marks

Want that glow back? A little oil and polish will do the trick.