I know what you are probably thinking.... I need to clean the thing that cleans?! Unfortunately, the answer is yes.
BUT it's not as daunting as it seems!
Washing machines and dryers, just like any other appliance, need to be cleaned on a regular basis to keep them working at their best. Most newer machines have a self-clean function which makes it even easier!
If you don't happen to have a washer/dryer that looks like it is from the future, no worries, you can still get them clean with just a little bit more work. Instead of the simple push of a self-clean button, you have to add bleach or a washer tablet and run an empty wash with hot water on the longest cycle.
And for either space age or prehistoric washers, wipe down all the rims, seals and liners.
For dryers, remove and soak and scrub your lint filter with a degreasing soap & inspect and clean the filter and hose areas.
Here is a handy image from Fluff Love that you can save and print to keep in your laundry area!
Your owner's manual can give you more detailed instructions specific to your models!