they're kind of expensive do they work absolutely they're great but if you have an oven don't feel like you can't do hydrate of course you can if you live someplace like Texas where I live you can do a lot of this outside but if you live someplace where it's a little more damp or cooler then you're going to want to use your oven easy to do don't be intimidated have some tomatoes from my tomato harvest and I want to preserve them so I'm going to dehydrate them I'm going to cut it into long thin slices you want to try and make your slices about the same thickness so they all dehydrate at the same rate so you don't have some thin ones that are done early and some fat ones that are done later try and make them all the same width you can add salt I don't because you know what I never know what I'm going to use them in am I going to put them into a salad which I'll have a dressing well then I don't want them salted am I gonna put them on a pizza well you know I can't always salt them later I don't put olive oil I don't do anything I just put them right on my tray I have a cookie pan and on my cookie pan I have a cookie rack I'm putting them on the cookie rack so that I have air her circulation underneath and on top it takes a while to dehydrate in your oven these will probably take maybe a couple of days but my ovens going to be on a low temperature just be sure you don't leave your oven unattended do it on a couple of days when you know you'll be staying home and plan some other stuff to do while you're there and and you should be fine we're going to take these over to the oven I'm over here at the oven I'm going to turn it to the lowest temperature I can on my oven that's 175 on some people's ovens you can do it as low as 140 don't go any higher than 175 I'm going to put my tomatoes in the oven and I'm going to prop the door open just like that I'm going to let some air flow through there in a couple of days my tomatoes will be perfect let me show you the ones I did the other day that's what they look like put them on pizzas on sandwiches on salads put them on anything where you would normally use Tomatoes they're delicious and you can see it's easy to use your oven as a food dehydrator