I'm using my dehydrator for the first time, and there is a smell a little bit like burning plastic. It's not too strong...I'm probably the only one who's noticing it. At first I thought it would only last a little while, but it's been plugged in for hours. I'm sure it's from heating the element for the first time. I'll try cleaning the element before I use it again. Has anyone experienced anything similar? I'm worried about us breathing the fumes, plus afraid to give the fruit roll ups I'm making to my daughter.