I recently removed mine. I used a tool specifically for that task. It is a handle with a right angle blade that slips under the edge of the glass into the seal. It also has about a 6-8" steel cable coming out from near the bottom by the blade that has a T Handle on the end of it. You hold the main handle with one hand and pull the handle on the end of the cable to force the blade around the glass, cutting the seal in the process. Worked a treat. Probably took me about 10 minutes to get it out. I got a little impatient toward the end and rushed it so I did crack the windshield, but it came out in one piece. No mess...