Sparks are an American pop and rock band formed in Los Angeles in 1972 by brothers Ron (keyboards) and Russell Mael (vocals). The duo formed in 1968 under the name Halfnelson. Known for their quirky approach to songwriting, Sparks' music is often accompanied by intelligent, sophisticated, and acerbic lyrics, and an idiosyncratic, theatrical stage presence, typified in the contrast between Russell's animated, hyperactive frontman antics and Ron's deadpan scowling. They are also noted for Russell Mael's distinctive falsetto voice and Ron Mael's intricate and rhythmic keyboard playing style.

Brothers Ron and Russell Mael grew up in Pacific Palisades, in western Los Angeles County, California, during the "Golden Age" of the LA club scene, with the Doors, Love and the Standells regularly playing the Whisky a Go Go on Sunset Strip and the Beach Boys playing the afternoon event Teenage Fair. Both Ron and Russell Mael are seen in the audience during the Ronettes' section of the concert film The Big T.N.T. Show, filmed in 1966. Both attended UCLA, Ron studying cinema and graphic art, Russell theatre arts and filmmaking. Detesting the folk music scene, which they considered "cerebral and sedate and we had no time for that", they developed a particular taste in English bands of the time such as the Who, Syd Barrett's Pink Floyd, the Kinks and the Move, which led to their description of themselves as "Anglophiles".  Forming Halfnelson in 1968, they soon came to the attention of producer Todd Rundgren, at whose urging Albert Grossman signed the band to his Bearsville record label. Their eponymous debut album - with the line-up consisting of college friend Earle Mankey on guitar, Mankey's brother James on bass, Harley Feinstein on drums and Rundgren producing - sold poorly, but after switching labels to Warner Bros. Records and renaming themselves Sparks, a play on the Marx Brothers, the re-issued debut spawned the minor regional hit "Wonder Girl".  Their follow-up album, A Woofer in Tweeter's Clothing, led to a tour of the United Kingdom, including a residency at the Marquee Club in London, These London appearances helped them to secure a significant cult following. An appearance on the BBC Television's The Old Grey Whistle Test led to wider interest where host Bob Harris compared the band to a cross between Frank Zappa's Mothers of Invention and the Monkees.

Answer the following question by taking a quote from the article: What did they do after the poor sales of their album?
switching labels to Warner Bros. Records and renaming themselves Sparks,