There are oils in your skin which give it a protective coating against cold weather outdoors and steam heat indoors. If you use a strong soap in the dish pan, these oils are dried up. Your skin gets rough and red.
14 seconds sound clip from the The 39 Steps (1937) classic radio play.
You can hear this line at 00:54:43 in the radio play.
Quote context
[...]
- First, a word from Melville Ruick.
- To protect these beauty oils, simply change from your harsh soap to Lux Flakes.
- There is no sting in the very gentle, soothing Lux suds.
- Almost at once, your hands will begin to look smoother and whiter.
- Begin tomorrow to keep your hands lovely by washing dishes with Lux Flakes.
[...]