trunk lock malfunction

In my 2006 model 307, the trunk lock does not open sometimes. When I open and close it from the remote after a few attempts, what could be the reason?

the oil on the locks solidifies because of the dust and when the cold air is added to it, the moving parts have difficulty moving, so in my own car, the doors have become locked.

My friend to get lubricated. The day I got the car was working the next day
There is spray oil for the guns, if you lubricate it with the clay, it will be dissolved.
The lock may be damaged in the adjustment. Lock to loosen and move forward a little.

I sprayed wd 40 but there is no change. I open and close the lock part with the key when the trunk is opened, the same after a few days.

Press the Acma button lightly and take your hand there. Hold the trunk elsewhere. I had the same chronic problem, so when I act like this, there is no problem in closing for a long time. If you put your hand on the button and raise it, I think the contact is forced by the force.

I heard from other people in 307s that this was a problem. I think there is a bit of chronicle in this problem ...: ((

Often without compulsion on cold days