Big old houses have stuff which breaks. I have a collection of pastes, cements and adhesives I sometimes use for small scale repairs. One is a metallic putty that you warm and shape. There are fancy glues for fancy purposes.
Yet I find these things sometimes work well and sometimes don’t. And when they do not, I find something that does — chewing gum. Not for every job, but really works well when it does. It is a formulation containing lots of chicle.
Cheap, waterproof, easy to mold, slow to dry, safe on hands, removable, tastes great, less filling.
So what are the downsides?