i have a set of chrome boot struts which i fitted to my mk4 about a month ago when i first fitted them they used to get stuck around half way i thought they mite juts need a bit of breaking in. a couple of weeks ago i sprayed them with a little wd40 as they were still stiff now another 2 weeks down the line and there still stiff and stick around halfway and it is difficult to open and close the boot. is there anything i can do to resolve this???

many thanks