Do not apply an arbitrary lubricant. The noise may come from a hinge, trim or a rubbing fitting, and some materials are incompatible with household oils or sprays.
What the observation tells you
Observe when the sound occurs during ordinary opening without repeatedly stressing the door. A rubbing furniture panel or loose pocket needs a different assessment from a hinge noise. Spraying into the area can obscure the source and contaminate nearby surfaces.
A useful next step
Check for a visible harmless obstruction and follow only the manual's permitted maintenance. If movement is stiff, uneven or accompanied by loose hardware, arrange assessment before forcing it further.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.