The Proper Care of Optics: Cleaning, Handling, Storage, and Shipping (SPIE Press Monograph PM233)

I purchased this book mostly for the chapters on cleaning optical components. Some methods you may have heard of but never learned (e.g. the drag method and chalk method) are described in great detail, by people that actually use the methods on crazy-expensive optics. I learned a lot and what I learned worked well in my practice. There are also chapters on cleaning materials, packing optics, inspecting optics, and so on. There's sage advice throughout the book, e.g. you don't have to clean it at the first sign of a blemish, and which components are especially sensitive to cleanliness.If you clean expensive optical components, get this book. You'll be able to clean even internal optical components without fear.

Excellent product in every way.