You probably need to clean up anyway stud...

But 3.5 miles each way is not that far. Allot of time you blow out your crotch because you don't have your pants pulled up. You might want to try wearing some slick shorts that are pulled up to your waist to decrease the tension and space...

For example, I noticed that I quit blowing out the crotch on my long Johns from winter rides when I started wearing them under my spandex bike shorts...