Shares of WD-40 (WDFC) - Get Report were falling Wednesday after the maker of multi-use oil products missed sales estimates, even though it beat earnings-per-share estimates. 

The stock was down 4.79% to $164.08 a share. 

Sales for the second quarter of 2019 came in at $101.3 million, missing Wall Street's estimates of $104 million, and rising over last year's second-quarter sales result of $101 million. EPS were $1.14, beating analyst's expectations of $1.11, and rising 6 cents over last year's $1.05. 

Not all products saw sales growth and WD-40 President and CEO Garry Ridge had an explanation. "We experienced two 'events' in the United States this quarter that resulted in a 6 percent decline in sales of WD-40 multi-use product in the country compared to last year," said Ridge. "This decline in sales was driven by the rotation of products that periodically occurs in the warehouse club channel as well as some delayed promotions with a key U.S. customer." 

Management guided for net sales growth of a range between 4% and 7%, with net sales expected to be between $425 million and $437 million for the full year of 2019. 

The stock is down 7.8% this year.