(I was on my phone... hate playing with links on my phone!
)
I will say one of the best purchases I made to support my Wahl is their oil.
I used to be very sparing with it but found that oiling lightly before and after usage really improved functionality.
I store it with the blades pulled back. I oil it lightly before use, clean it after, then oil it lightly again after cleaning, and put the blade cover on.
Anal, but it's basic knife care and I know you can appreciate that!
Nothing worse than clippers that are pinching your whiskers!