I don't know if it is related or not, but I find my ability to use pens and pencils has greatly diminished since I started to use the keyboard. My handwriting was never great but over the years it has dropped to a level that is best described as illegible.

I can type about as fast as I think, a speed that would be unattainable using a regular writing instrument based on re-creating memorized shapes using fine motor control. Maybe the slow-down that comes with using a 'real' pen or pencil for writing would give you the right frame of mind to unlock your inspiration.

The short version: try writing in longhand, see if that helps!