Any time my dog licks a bowl clean, it takes forever to wash his saliva off. Much harder than oil or even butter. Yes I am using dish soap, hot water, and a scrubby sponge.
In: Biology
The dog slobber has a lot of non-fatty proteins and other biological gook. Enzyme-based cleaners do a great job with this. A lot of dishwasher detergent (even the cheapo stuff) has some of this stuff in it (standard liquid dish soap probably not) so try adding a splash or to of the powder or gel or whatever you keep under the sink for the dishwasher. works a treat with my dogs disgusting bowl lol.
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