How to lubricate a GQ short boot door?

[Wine_maker]

Its really hard to open it. I cant find any holes or any lube point on the door butts.
WD40 helps a little but all back again after week or two.

[BigRAWesty]

Its really hard to open it. I cant find any holes or any lube point on the door butts.
WD40 helps a little but all back again after week or two.
If you have the black hinge covers take them off and spray directly onto the pin.

[Wine_maker]

I tried, but without long effect. I think I took a wrong oil. I'll try again, thank you :beer: