Try using something like this Molykote Product.
Molykote® D-708 AF CoatingMolykote® D-708 AF Coating
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