I have an 8 yr old home - two story . I recently noticed water stains in the bedroom and interior wall. I checked attic thoroughly and did not find any moisture at all and it hasn't rained but once in the past two months. Insulation in attic is probably 10-12 inches, but I could not find any soiled insulation anywhere. Could this be something else? Condensation from bathroom fan? What can I check? I am wanting to paint the bedroom, but want this issue addressed first. Thanks!