
Hehe... You try it... Remember the fabric softener though, it may boost potency. 
Know that the common laundry machine does never reach boiling temperatures and that makes me believe that they are useless in this matter.
Also think of having straw stuck in your machine forever... and ever... and ever...
But go ahead and try it. The world would be a dull place without "mad scientists". 
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//Moomin666 -When madness is an art...