Anytime the bond is leaking, it's because the wiper inside has gotten loose. The wiper is the plastic piece that is placed inside each bottle controlling the amount of product that comes out. In order to tighten the wiper, squeeze the bottle tightly shut so it pops back in. Once you open it back up, you'll be able to see the wiper is lodged back in. This is not considered a factory defect. When acrylates and oxygen meet, the formula becomes stickier and dislodges the wiper.