Found these on a***on.com. Little silicone plugs to keep juice/dirt/general crud out of your charging ports!
http://www.amazon.com/gp/product/B00E0H72DC?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00
http://www.amazon.com/gp/product/B00E0H72DC?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00