Wiper washer not working right

[longhornfrontier]

I searched this forum and couldn't find the answer to my question so am posting now. I have an '09 Frontier V6. The wipers work fine and the washers do put out a little water, just not near as much as before and the washer fluid tank is full. It used to spray the windshield and now dribbles out. I'm guessing the lines are clogged, but I can't seem to get the outside squirters off the truck. I don't want to just rip them off. Is there a way to correctly remove the squirters? Also, how do I get to the lines to check them. They seem embedded in the cowl housing. Thanks for any help you can provide!