Product review (5 stars): If you are mechanically inclined this is EASY
First get the bellow out and lay it out so it unfolds. Next look for a video showing how to change the bellow on your specific model. I used this video:
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What this guy doesnt tell you is WD40 makes sliding the bellow onto the mating surfaces super stupid easy! The con to this is it will require extra hands to keep it from sliding off! So weigh your options accordingly.

I opted to clean my drain out while the front lower cover was off. Glad I did it was partially blocked with debris. Clean out the holder and the recepticale and lube up with WD40 before putting back in.

When done run a spin & rinse cycle. Check for leaks. If no leaks add bleach and run a clean cycle.