This might give you a little insight:
http://www.bluelinegear.com/about/faq/1
But beyond that, you might want to join up with Strider Hardcore Forum to get more useful informations or contact Warranty Dept. for direct answer. Be weary getting answer from those don't even own a Strider.
When I had my new Strider, my case was different than yours. Pivot was really tight and lock was sticking. Per Strider's site, disassemble knife will not void warranty. But screwed it up in the process, another story - Strider discourage take their knife apart in general and encourage to let them deal with problems.
On the other hand, I am fairly capable, pivot came with some kind of locking compound, very tight, so I made this precise fit spanner to help disassemble, clean and pack pivot with Christo Lube to help break in. I adjusted pivot to zero lash and for the lock face, applied thick layers of Sharpie several times certainly helped too. During the three week break in, painfull at times on the thumb, Striderholics call that Strider Thumb - I, among others, went through the rite of passage. Now it is smooth as can be and without lock stick.
HTHs!