Reminds me of a story.

Some vandals tried to burn down a piece of heavy equipment. They stuffed a piece of notebook paper in the fuel filler neck and lit it. Nothing happened but the paper ended up in the fuel tank. The tank was part of the frame so it couldn't be removed from the machine for cleaning.

After a while, the machine started to die- of fuel starvation. The mechanic would come out and remove a piece of paper from the fuel system and it would run again. At first the machine would die a few times a week but after a month or so the problem was much less frequent. The problem occurred once again three months later and after that it ran flawlessly.

It doesn't mean that there are no more pieces of paper in the tank but the odds of the problem happening again are much less.