Bryan Gray

Three months is a good benchmark and I’d also swap sooner after a cold or mouth infection. Head style and paste matter; whitening or charcoal pastes and stiffer bristles wear out faster, so softer heads plus a lower-abrasive paste can help you hit that 3‑month mark but then let it dry uncapped between uses, and try holding the brush with your fingertips to keep pressure light.

Kindle Paperwhite is probably your sweet spot: glare‑free e‑ink for porch reading adjustable warm front light, and font sizes that get large, often under $150 on sale. For comfort and bump up the font weight (bold), widen line spacing and margins, and try dark mode at night. If you’re sensitive to reflections, a cheap matte screen protector can help even more.

Most guidance points to swapping every three months. If the bristles splay and feel rough at the tips, or the color fades on the wear indicator, change sooner which, yeah after a cold or stomach bug many people replace as well. If yours are flaring at two months, try easing up on pressure and letting the brush do the work. Rinse and let the head air dry between uses and it often lasts closer to that three month mark.

Think of the that model-C hub as a splitter for one DisplayPort feed. Your Mac sends a single DP Alt Mode signal over the that model-C connection. Some hubs can convert that to two HDMI sockets but they are still sharing the same DP bandwidth. With DP 1.2 level signaling you have roughly enough for one 4K60 stream. The leftover becomes 4K30 or 1080p60 on the second port. Newer hubs that rely on MST to pack two 4K60 streams expect the computer to support MST for separate displays. macOS does not on external monitors. Not something macOS will magically enable with a firmware update. So for two 4K60 independent desktops from a base M2 you need a second display engine that does not come from native GPU output. That is what the that model graphics approaches provide. They present themselves as additional displays over that model and handle the HDMI conversion in the dock, which is why they need drivers. Thunderbolt without that trick will not bypass the one display limit on your model.