How do you correct repetitive typing mistakes?

I find myself making repetitive mistakes typing keywords and sentences in my code comments. I notice its getting worse since my fingers just keep "practicing" incorrect words.

Is there any solution to this? Like a typing tutor designed to help correct repetitive mistakes?

The only way to correct this is to retrain your muscle memory. If it's important enough to take the time, the only way to retrain muscle memory is repetition.

For example, I tend to spell the word "the" as "teh" because of the same scenario you're asking about. To retrain the memory I would just spell the word over and over, starting slowly, striving for 100% accuracy, and increasing the speed. It's the same technique I use to get better at Guitar Hero.