We own a 25 year old log home which we built. It’s time once again to wash and seal the exterior. Is there anything we can use(besides the bleach water,etc) that removes mold,etc. that won’t come through the logs? We’ve pressure washed 2 sides with excellent results on the exterior, however we had some leaks and it’s making more work than we anticipated! Hoping there’s something that works without the pressure…