Common Questions
From Typewriter Wiki
Others have also felt your pain.
Removing hair and dust (some crusted in)
A detailing brush with a small handheld vacuum that's used for computers can be effective at removing hair and other debris. Other tools one might use are a dental pick, a paint brush, and pipe/straw cleaners (single use or reusable, hard and soft). Using tools can be more effective than canned air at times.
An air compressor can send piece of your typewriter flying if they're not secure, so some prefer a low powered vacuum with a dust cup with filter. There are ones for cleaning electronics/keyboards that can serve this purpose. Others used canned air or low pressure compressors.