You may find the locking tabs at the base of the hinges or up along the side of the oven door pocket.
How to smooth oven door hinge.
First you have to turn off the oven and let it cool off.
Rotate flip up hinge lock latch toward oven door to unlocked position.
Release the hinge locking tabs.
Then apply the lubricant to the pivoting joints of the hinges.
Check the door springs to see.
Open the oven door to its full extent so that the door is parallel with the ground.
Hinge lock latch will vary depending on model number.
Most ovens have hinge locking tabs but some do not.
It is absolutely essential that you check the receiver as well as the hinge as if it is damaged in any way and you simply fit new door hinges they are incredibly liable.
Also you can oil it up and then wipe off the excess.
Open the oven door.
Carefully remove the door by grabbing each side firmly and lifting up until it pops off of and away from the oven.
Push the door firmly onto the connectors making sure it is even on both.
Replace the hinges with identical new ones and hook them back into the hinge holes in the oven.
You can squirt or spray the grease.
If your oven door does not have hinge latches to unlock simply open to the broil stop position and carefully pull the door up and away from the oven.
Then open the oven door.
How to lubricate oven hinges.
Locate oven door hinge locks latches in both corners of oven door.
The most common cause of oven door hinge failures is simply that one of two components will fail either the oven door hinge itself or the oven door hinge receiver has failed.
This video shows the process to reset the oven door hinge should it become sprung in the removal process.
Slide the hooked portion of the hinge back onto each of the connectors on the oven.
Hold the door at an angle to the oven.
Oven doors have two door hinges a left and right which allow the oven door to open and close smoothly and at a controlled rate.
After that open and close the oven door until the squeaking stops.