There is an inherent problem with the design of shower heads. Not some of them, all of them. The problem is that their very design creates the ideal circumstances for mold to thrive within them, internally, in areas that you cannot access for cleaning.A bathtub faucet or kitchen sink tap is simply just a shaped pipe that allows water to flow through them. When you turn the water off, the pipe mouths quickly dry, thanks to their relatively wide shape and local airflow.Showerheads, however, are complex workings of intricate inner channels and nozzles, designed to break the water flow into spray patterns that end users find desirable. These channels are all inside the showerhead and get little airflow. The channels can never really dry out completely, and over time, that interal dampness allows bacteria and mold—including the dreaded black mold--to thrive. In this shot of a showerhead that has been cut open by a saw, a lot of what you see is the detritus of the cut plastic, but you can also see the brown stuff. And deeper inside the head, you find this: The mother of Steve Sunshine, an inventor, was suffering from respiratory issues. Sunshine disassembled her showerhead and found it was filled with mold. He subsequently designed this ShowerClear: This ingenious design pops open, so that after a shower you can let the shower head's innards dry out. It also makes it easy to clean, so you can eliminate mineral build-up. (This eliminates the mild hassle that many of us undertake to clean our showerheads, which is soaking them in a vessel filled with vinegar for a few hours.) The ShowerClear heads come in a variety of finishes and run $140.

Here's what we looked at this week:Objets d'esign: Lexon is releasing speaker and lamp versions of Jeff Koons' Balloon Dog sculpture. Volvo's new Multi-Adaptive Safety Belt compensates for different sizes, shapes and crash severities.Dometic's designey coolers use a different manufacturing method. Wandercraft's Eve, the world's first self-balancing exoskeleton, allows people to walk again.U.C. Berkeley's tiny pogo robot has a unique locomotion style.BARE designs a better—and less expensive—Dutch oven featuring a host of UX improvements.Clever materials use: How to clear standing water on a flat roof using rope.Architecture that works with challenging terrain, not against it: The Zig-Zag Resort, by JA Joubert and UNS Architects.Industrial design firm APE creates the Echo Pro, a perfect-fitting bike helmet with a novel adjustment mechanism.The Splay Max: A folding portable 35" monitor.Industrial Design student work: Dashiell Schaeffer's Curvesse rocking chair, made from a single sheet of plywood.These unusual, "anti-ligature" doorknobs are designed with a grim functional purpose.Designey tool kits: A trend with legs.BareBag's unusual design approach: Bags that serve as hanging points for other bags.From Germany, the NOHRD SlimBeam is a handcrafted, attractive piece of home exercise equipment.Why America's streetlights have been turning purple.When industrial design is subject to aftermarket modifications: BoxPlates to undo the PlayStation 5's look.This ShowerClear design fixes the mold problem all showerheads have.Industrial design case study: Curve ID tackles industrial kitchen equipment for JAVAR.