Is there an easy way to clean a front loader washing machine ?

Check your manufacturer papers. Cleaning it with products not recommended by the manufacturer may validate warranty.

Here's a good trick:

http://www.hometalk.com/diy/clean/appliances/how-to-clean-your-front-load-washer-8051235

There are washing machine tablets you can purchase wherever you buy your cleaning supplies that will maintain a clean washing machine. Read the instructions for Frequency of use.

Leave the door open to reduce the mold buildup.

also by leaving the door open the rubber gasket dries a lot faster.

I usually run it with vinegar where the soap goes and then sprinkle baking soda on the inside. Then after it runs once with that, scrub it down with the same solution if needed. For the rubber part, if the solution doesn't work you could try a little bleach there too :) Regularly cleaning it will help it not build up in the future.

there is a class action suit for this exact problem. You should look it up online.

Here is a step by step way to clean it from right here on Hometalk: https://www.hometalk.com/posts/clean/appliances/how-to-clean-your-washing-machine-using-vinegar-and-baking-soda-21697626