Try using something like this Molykote Product.
It is used for oven door hinges and so it will resist the high temperatures.
For those that have issues with this Lubricant and would like a Lubricant used by frigidaire :
Notice this is high temp lubricant #930-AA http://www.appliancepartspros.com/frigidaire-lubricant-high-temp-5303307893-ap2147006.html
Which you can see here: https://www.lubriplate.com/Products/Multi-Purpose-Greases/930-Series.html