Something many have asked for over the last few years, I have finally recorded it. Now there is risk of damaging your headlights so only attempt this if you accept the risk:
Hi thanks for watching, that method you mentioned is very similar to how I had done it in the past. Thought it was worth trying the oven method and was pretty successful without any melting etc.I did mine without the oven part as I was worried about damaging my lights!
while still attached to the car (to keep it secure) I heated the adhesive with a hairdryer at the top of the light and used a trim removal tool to get the glass moving away from the plastic part, once it was moving as the adhesive softened i ran the hairdryer along the adhesive pulling it apart, putting it back together was the opposite, warmed up the adhesive and pushed it back together