Testing the limits of the phrase "there is no such thing as a dumb question"...

My heavy cotton apron, I am shamed to admit, has not been laundered for a year. Does anyone have a suggestion on how to wash an article that is literally caked with dried dough, flour etc. My concern is that putting it in the normal laundry, a front load machine, will cause clogging in the system.

Thanks,

John Ambrose