Yes. Remove the outer plastic cover - it just pulls off. You should be able to see the cable that plugs into the gizmo without actually pulling the sensor itself from its holder. If the cable is plugged in, then your trouble is probably the gel and you will need to pull the sensor from it's holder. It's a bit of a bother to remove all the old gel and residue from the sensor and the inner surface of the windscreen. It sort of 'rolls up' with your finger tip and then you can pull it off in pieces. After you get all the residue off clean the areas well so the surface on the windscreen is smooth and clean.
Also, make sure the sensor is sitting on a completely level surface when squeezing the new gel onto it. Just go VERY slow and you will notice the gel slowly leveling itself as it sits.
On my first try, I added the gel too quickly and as it settled, it ran over the edge and into the sensor itself. I had to re-clean it and buy a second kit. Make sure you fill it enough that it sits higher than the surrounding areas as in the video and allow the gel to set (10-15 minutes in sunlight) before you push the sensor back into it's holder against the glass. Otherwise, when you tilt the sensor, the gel will slide around and drip off the edges.