I am a convert to everything natural and never once thought about how I was using chemicals around my family or my animals. I was invited along to an afternoon chat with a group of women and a lovely lady introduced us to doTerra oils. Witch Dr stuff my hubby would say. Well after listening and thought geez, I could try this stuff. My go to for cleaning is peppermint oil, vinegar and pure water. Love love love. My visitors always notice when they come into my house now and comment about the fresh smell. I now make all my DIY products, laundry detergent, dishwasher cleaner, shampoo, soap, you name it I make it. It actually works out cheaper than buying all the chemical stuff. We have terrible problems with the horse fly here. They truly bite and my animals hate them too. I make my own spray for them, all natural.
Suggestion flopen, have an afternoon tea or morning tea and invite a rep from an oil company to give a little chat. This way it isnt stepping on your DIL’s toes but offering an alternative, but please don’t tell her how to clean, it sure will be the worse thing you could say to your DILand friendship would be ruined. If you need more info, would only be too happy to assist you