|
None of the above.
Rubbing alcohol with baking soda. Plastics CAN and WILL adsorb soap and only detergent soap will cut the grease. Detergent can leave a phosphate residue. Alcohol and baking soda paste will scour the crap out, and because alcohol mixes instantly with water, no residue can remain. Of course, rinse well.
This is also how you clean glass when you repair an aquarium.
Actually, there may a strange occurrence here; if you've cleaned them at all, there probably is no actual residue in the buckets, but because the plastic is so slick, it simply feels like there is a greasy coating left. I worked in food service for a long time and used many food buckets over the decades.
Whatever - baking soda will rough it up, so it won't feel greasy any more.
|