Originally posted by roadmaster I will get over it and will be very careful when changing lenses in the future.
That's what I always do. I have the lens I want on the camera ready to mount when taking the other lens off, prioritise getting the lens on the camera over putting the cap on the other lens, try to hold the lens mount down when changing lenses whenever possible, try not to change lenses in a dusty or wet environment and minimize the time the mount on the camera is without a lens (not more than a few seconds at a time). I might be overly sensitive when changing lenses, but I can only remember having to use a rocket blower once to get some dust particles off the sensor in a few years now. My sensor might be due for another blowing now, but it could also be that I don't take the right pictures to accentuate any sensor dust.