Yes, there's a big thread on it on here.
Take the projects apart and give the lens a clean from the inside, also take a look at the quality of the reflective coating inside, it's not uncommon for them to flake/peal off making them less reflective.
Failing all that, you can buy some projectors from retro-fit (IIRC) that's a direct fit into our cars, about £120 for the pair and they'll be like new again.
EDIT :
https://www.volvoforums.org.uk/showthread.php?t=239639
2nd EDIT: Guide here:
https://www.volvoforums.org.uk/showp...&postcount=486