Dear Heloise : As far as hiding a spare house key, I use a double-layer system: My garage key is hidden on my back porch (disguised as a piece of caulk), and this key gets me into my garage, where my house key is hidden. It’s a fantastic system. I read your column daily.

— Richard K. Fort Wayne, Ind. Switching to froyo Dear Heloise : Of course, homemade ice cream is the best and can be bought at some great ice-cream shops.

But I grew up on mostly store-bought ice cream as a little kid. Unfortunately, as I grew older, specifically in my 60s, my body did not like ice cream like it used to. Maybe I was eating too much of a good thing? So, I switched to a frozen yogurt that my body likes.

(My favorite is black jack cherry.) I’ve loved your column for years. — Rosemary M.

New Hampshire Onion and peanut butter sandwiches Dear Heloise : In the 1950s, my mother introduced us to peanut-butter-and-mild-onion sandwiches. My sister and I love them — even still today. My daughter also indulges in them.

I think I found the idea in an old sandwich cookbook from the ’40s. Maybe it was introduced because of rationing during World War II. — Daphne Kivinen Vancouver, Wash.

Solar-powered dehumidifier Dear Heloise : Many of us suffer from high humidity for at least part of the year. Please, someone, invent a solar-powered dehumidifier that can go outside. We can put them in the garden and near our trees, saving us from having to water them and lowering the air’s humidity at least .