Steel is the most common material for spring washers due to its ease of process and its high tensile strength. Chrome vandium alloy is a higher quality steel with a good through-hardening capability; it is used to make very thick spring washers.
How to Prevent Swimmerâs Itch. Thereâs no cure-all to eliminate swimmerâs itch. The negative symptoms are, ironically, a problem of our own immune systemâs making, and short of abstaining from swimming altogether, thereâs a risk of getting swimmerâs itch in a Northern Michigan lake.
A scratch or other irritation to the ear canal can also lead to swimmer's ear. How Do I Know if I Have Swimmer's Ear? Swimmer's ear may start with some itching, but try not to scratch because this can make the infection worse. Ear pain is the most common sign of swimmer's ear. Even touching or bumping the outside of the ear can hurt. The infection also could make it harder to hear with the infected ear because of the swelling that happens in the ear canal. If a doctor thinks you have swimmer's ear