There’s so much happening, but as always, readers made the time to send us thoughtful notes and comments. Here are a few of the good questions and excellent contributions from April. We did notice an odor coming from two Coway replacement filters we purchased in February, but the smell dissipated quickly for us. If you’re an odor-sensitive person, either one of those two replacement filters should work well for you. for giving thoughtful and in-depth answers to other readers’ questions in the comments section of our guide to ergonomic keyboards and our list of gear for getting reliable Wi-Fi in any home.