While studying at Idaho State College (now Idaho State University) in 1957, Aslett and others formed Varsity Contractors Inc., a janitorial service, to help pay his college tuition. The Pocatello, Idaho-based company is now a full-service janitorial contractor with total revenues of $190 million.

Aslett has written over 35 books on cleaning topics, including Clutter's Last Stand and Do I Dust or Vacuum First?: Answers to the 100 Toughest, Most Frequently Asked Questions About Housecleaning. With his eldest daughter Laura Aslett Simons, an interior designer, he co-authored a volume titled Make Your House Do the Housework. He also wrote Is There Life After Housework.

Aslett has appeared on QVC, The Oprah Winfrey Show, and several other nationally-televised programs. Aslett has also served as a motivational speaker for several business and government-related entities.