This is a common thing, but still helps to see it visually!
I've been asked how I maintain my fursuits and heads, when I talk about wiping them off, here's how I do it!

When stored fursuits get dusty, when worn they get a little dirty, so maintaining them by wiping them off really helps them look like new!

For a more in-depth spot cleaning tutorial, see here: http://www.furaffinity.net/view/12838475/