Yeah, I saw one of those lens-cleaners for sale at Future Shop, so try one of those.
As far as I know, the only other dual-layer game for Wii is SSBB.
"The worst part about these reviews is they are [subjective]--and their scores often depend on how drunk you got the media at a Street Fighter event." — Mona Hamilton, Capcom Senior VP of Marketing
*Image indefinitely borrowed from BrainBoxLtd without his consent.