Over time, even the best rain jackets can lose their water-repellency. Whether it’s from rubbing against a dirty car while packing groceries or a muddy dog wanting snuggles, a dirty jacket will eventually stop repelling water. This process is known as “wetting out,” and it’s when your jacket starts to soak up water instead of keeping it out. Fortunately, reproofing your jacket is easy and can bring it back to its former glory. Here’s how…