My husband can’t make me squirt. Why?

I am a squirter! Many men have made me squirt but my husband can’t seem to make it happen. I’m so lost. He’s tried & tried. Now it seems like he wants to give up. How can I help him get me there. Typically I can squirt within a few seconds but he has tried for several minutes & I’m just lost. He needs help & I don’t know how to help him? Any advice?