DeOxit vs WD40 vs Contact Cleaner - Shootout

From DeOxit data sheet:
"Use DeoxIT® D-Series contact cleaner on surfaces that have been in service or have visual signs of oxidation. Contains 20% active cleaner"
5oz can List Price $18.95
WD-40 12oz can $4.97
NO...Don't use CLR for electronic work!! It eats everything!