Because of the unusually large amount of data included in a single game, Super Smash Bros. Brawl became the first Wii title to be released on a dual-layer disc. Unfortunately, the large amount of data caused some early Wii models to read the disc more frequently than their drives could reliably handle when the game was released in 2008, resulting in disc read errors for some players. This issue occurred because certain early Wii units had contaminated or dusty disc-reading lenses, which affected the system's ability to properly read dual-layer discs. To address the problem, Nintendo offered to repair affected consoles free of charge. Players could send their systems to Nintendo's official repair service, where the disc lens would be cleaned or replaced at no cost.