I took the oven apart and looked up the insulation online. It was easy I entered in the model number and ordered the right stuff. It arrived at my house the very next day. Put the insulation in and put the oven back together. Wish I could say I was able to mouse proof it, but no such luck. Hopefully the traps will keep them from getting back in. Now when I cook I smell food cooking not the disgusting aroma of mouse urine. Price on this site was more than ten dollars cheaper than other places I checked.