With their large ears, Devon's typically produce some to a lot of wax in their ears and around their toe nails.
While petting and luring your kitty with treats, you can clean the accessible surface of the ears with a cotton
ball moistened in saline or better with an ear cleaner that your vet provides.  Clean the ear canal with a clean
dry cotton swab afterwards. Cats have "L" shaped ear canals,but you should not go too deep and be gentle.
Otherwise she/he will not let you do it again. You can use the saline around the toes as well if it becomes
really bad otherwise leaving it alone.

Cats with white or light-colored faces will stain around the eyes with the occasional tearing. If you want to
clean around the eyes, you can use a cotton ball moistened in saline for this as well.

Most Devon's do not need regular baths but some can become ‘greasy’ – showing  brownish gray stains in
areas with the least amount of fur. Kitty wipes will  keep those areas and  coat clean, and minimize shedding
(All mammals shed including Devon's and humans, but only in little bitty pieces). If you prefer to give your kitty
a bath, do not submerge your kitty in a sink full of water. Use a little bit of water to lather with a tear-less baby
shampoo (such as Johnson's) or Cetaphil Facial Cleanser (but be careful not to get this in the eyes). Use
clean towels and warm water to wipe off the soap until no more soap residue. Although,  most Devon's like
other cats are not thrilled about getting wet.

Give plenty of petting and talking sweetly to your kitty while always cleaning their body, ears and eyes. That
way they think it is TLC time rather than torture.