Thanks for playing! As for level 7, there is a quite specific way to end up with both items black. The "Wrinkly Red" level may spring some ideas. Good luck with the Bonus levels!
In level 7 (Rainy Day), all the clothing is the same colour (white), and I can't find something that will transfer colour like in Wrinkly Red. The hints also are not correct, it says the pants _have to_ be ironed last, but ironing them first works just as well