In the emerald countryside of Wales sits a manor named Nantclwyd Hall. Built 400 years ago, the luxurious two-story brick sanctuary is painted peach and capped with a gently sloping slate-gray roof.

We don’t always have the answers, but we have some people on speed dial who do — which is why we present to you our series FYI where we have experts explain if lip balm is actually bad, how often ...