What happened Shares of Shares of the maintenance products company hit an all-time high back in February but have since tumbled close to 4% year to date. Image source: Getty images. So what WD-40 released its second-quarter earnings for the period ended Feb. 28, where net sales grew 12% year over year, led by a 19% year-over-year increase in sales to EMEA and a 39% year-over-year jump in sales to the Asia-Pacific region. Net income for the quarter surged by 20% year on year to $17.2 million. However, net sales to the Americas region dipped by 1% year over year, primarily because of an 11% year-over-year drop in the sales of maintenance products in the United States.