I stupidly left my&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Plantronics-Voyager-510-Bluetooth-Headset-Retail-Packaging/dp/B0009B0IX4/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Plantronics Voyager 510 Bluetooth Headset [Retail Packaging</a>] in my car too long before realizing how the sun and heat were going to expedite the disintegration process of the foam covering of the earpiece.  I don't use my Bluetooth earpiece often, so when I did go to use it, the soft foam just crumbled in my hand.  I was irritated with myself because I had no idea where to get a replacement foam covering.