Fine Camera Cases Do You Keep Your Little Digital Camera In A Heavy Zip-Loc Bag To Keep Out Dust, Even Inside The Camera Case?

Do you keep your little digital camera in a heavy Zip-Loc bag to keep out dust, even inside the camera case? - fine camera cases

I bought a Canon PowerShot A530, which is nice in general, but it seems the part of a family of entry-level digital cameras announced by Canon are vulnerable to the dreaded E18 "error", apparently mostly of fine sand or dust associated with the Processing used lens (the lens automatically before extrusion unit is ready to make pictures).