I gather you’re referring to the combi can? My own one and two others I know of have played up, not springing back when it fills. My second one (which husky sent me) has been fine. I thought it may be an internal o’ring quality issue but not sure as I haven’t pulled it apart, you’s who have no doubt know what’s in there. Here’s a tip though when using it, hold the handle by putting your thumb through and place the bottom of container on top of forearm/bicep and with left hand push back on the nozzle section before lifting it out, therefore shutting it off. I did this for quite some time before the second one arrived and it works.