EF-S 17-55 2.8 IS USM Dust Issue

I've never had a Dust issue with this lens and I shoot in a lot of dust and sand.  I do keep a B&W Haze on the fron at ALL times so there must be no gaps to let dust in through the barrel.  The ONLY issue I had was a lack of focus and sent it in and Canon fixed it for FREE.  I know some creep but it's easy to work with.

NOTE:  This is an AMAZING lens.  I'm very happy with it.  Very