21st C
I hate cakes of soap on the hand-basin which begin to show their age by means of nasty black lines leading to horrible cracks. So I started buying quite expensive and well-known brands of liquid hand-wash in bottles furnished with neat little pumps to work them. Now I find to my horror that those pretty bottles (usually plastic) dribble their contents onto the hand-basin and start eating through the porcelain, leaving an obvious mark which feels rough to the touch. If the liquid can do that to a hand-basin, what is it doing to my skin? So I am, like Margaret Gainsborough in the 18th C, now back to using old-fashioned good quality soap in the bathroom. She, of course, didn't have the luxury of the latter.