If I had the ability to invent anything I would make a 3d printer that prints clothing. At the end of the day you would just need to put the clothing into a receptacle that broke it down and recycled the materials to print new clothing. Not only could I have a limitless wardrobe in a limited space, but I would never have to do laundry again.
If I could invent anything else it would be some sort of device that gives me back all of the hours I have had to spent washing, folding, and putting away laundry. We're talking years of my life at this point. #Ihatedoinglaundry