Foam cannons are actually pretty simple machines. If it's been working for a while just fine, and then starts acting like this, there is likely a clog in the system. And even on a new cannon, all it takes is one little spec of something to clog it up. Check out the attached guide from MTM on how to troubleshoot several different issues. You should go through all of them just in case so that you cover all your bases. More often than not, this will clear things up. The guide is technically for the Original MTM Foam Cannon and not the PF22, but the principles are the same.