Snaps and zippers on awnings, straps, and other items suffer the corroding effects of rain, dirt, and grime.  The result is often a mechanism that either sticks or rips the surrounding canvas or plastic.  A simple alternative to fighting with snaps or zippers is a quick dab of water-resistant Snap-Stick lubricant, which comes in a handy tube similar to Chapstick.
                    
                    SKU: #