I'm posting this here since it's not a brand-specific question. My Canon 80D turned 10,000 yesterday, and I start to confront the inevitability of having to blow the dust off the sensor. The on-line directions seem pretty straightforward; as long as the mirror is locked up in cleaning mode and I don’t actually touch anything with the blower, it seems like not a lot can go wrong. But the prospect of diving into the innards of my beautiful camera is unnerving. So my question to you: has anyone here had a bad experience with sensor cleaning? If so, what went wrong, and how would you avoid it in the future?