to restore dry erase boards that are hard to erase: spray a clean board with wd40, wipe dry with paper towels. the wd40 fills in the dried pores of the board that hold in marker ink, making it easier to erase.
I started doing this and will never stop! My tub shower are always spotless-so simple. Simple shower and tub cleaner: fill wand half and half. Wet surface and scrub. wow! leave in shower wash while you are already in there. Need to try.
How to get your dirty whites clean again... HOT HOT HOT water, 1 cap of laundry detergent, 1 cup powdered dish washer detergent, 1 cup bleach, 1/2 cup borax. you have to rewash it once to put softener in but it's the whitest you'll ever see your whites. If you omit the bleach it works great to get stains out of colors too (baby spit up is no longer a stain on OLD clothes)