http://www.washingtonpost.com/blogs/the-switch/wp/2018/06/22/apple-finally-offers-a-free-fix-for-your-sticky-macbook-keyboards/

Apple acknowledged Friday that some of its MacBook and MacBook Pro models have sticky keyboards, and will offer free repairs and refunds to anyone affected by the flaw.

The company said in a statement that the issue affects as “small percentage of keyboards” in certain MacBook and MacBook Pro models. Affected laptops may have keys that repeat letters, feel sluggish or don't respond at all.