[Q] jack 3.5 doesn't fit! topic

Hi, I use headphones sometime and tomorrow I discovered that every normal jack 3.5, which fit in perfectly like 2 days ago, doesn't fit well!
In fact I can hear almost from the left. I tried to remove dusts inside it, but it didn't solve anything, and I don't know how to fix this.
I've garancy but I don't want to waith 2 weeks for something like this... Any toughts?
Thanks and sorry for my horrible english