If you use a dishwasher, the film you speak of may actually be etching. Which won't come off.

Oven cleaner will take off the food and burned on grease safely.

Yes, oven cleaner. It removes all the dried on backed on food and grease and will not scratch the glass.

I never use anything as toxic as oven cleaner on food containers. Make a paste of a little baking soda and water, spread on the stuck on stuff, let sit a bit, then scrub with a nylon scrubby. Baking soda is one of the most effective kitchen cleaners you can find. It's non-toxic, anti-bacterial, non-abrasive, inexpensive, readily available. I use it on pyrex, my rangetop, my pots and pans for those brown spots on the bottom, stains on my formica--I've even used it to clean the bathroom.

Try Dawn Power Dissolver, I have used it on mine and it cleans up well.

Barkeepers Helper is the only thing that will work really well. And it makes very light of the work.

I use SOS pads.

I respect the opinions of others, but glass will not absorb anything, so oven cleaner is safe to use as it can be rinsed off completely. This is one of the reasons it is used in labs.

One must be careful in the application of oven cleaner, and I recommend using it outdoors. Oven cleaner Ph is a *base* not an *acid* as so many think. Or you can make a paste of lye and use it, and avoid the possibilty of oven cleaner spray getting in places where it will do damgage - like the lungs or skin.

SOS pads and BKF are both very abrasive. Even baking soda is abrasive. I would not use it on glass. But that is just me. There is no "right answer".

There are also two sorts of oven cleaners. One much less caustic than the other. The nasty one says sodium hydroxide. The other Sorry, nevermind.

I HAVE A VINTAGE PRIMARY SET THAT IS IN GREAT CONDITION, HOWEVER THROUGHT THE YEARS THE COLORS HAVE FADED (USING AND DISHWSHER) i HAVE READ SOMEWHERE THAT I COULD PURCHASE A PRODUCT THAT WOULD RE-NEW LUSTER AGAIN. DO YOU KNOW OF SUCH A PRODUCT.