Trouble restoring one piece headlights

Does anyone have any tips for getting their one pieces to be the glass clear hue? I’ve followed the teg tips exactly and got all the yellowing off but it still remains sort of a blueish tint and when that didn’t work I even took of the lens and did the same to the inside. Will clear coat make it look better and are the teg tips even the best way ~20 years later? Please lmk I’ve been going at this for days!


There’s a headlight restoration kit that includes a spray that I’ve been happy with using on other cars, but I haven’t tried it on one-pieces.

“SYLVANIA - Headlight Restoration Essentials Kit”