I had that happen too. Thought it was because it got old , but it didn't happen with my other sprays. And also, thought maybe I got cheap and didn't put enough on - but I am sure it was the same as always. It was most annoying. Even though I usually spray and then pin sparingly, the spray makes it so much easier. I quit buying 505 after that - it is a lot more expensive and just didn't do the job.