honestly though the one I linked is like a PCB pressure washer in a can, I have seen nasty dsub connectors that I hit look like I sprayed a real pressure washer into a flower pot.. had to wipe down the entire table after
Now, if you get contact cleaner, like QC brand from home depot, thats also pretty powerful.. much more then say a can of deoxit.
The idea is you want a 'flush' not a cleaner. Flush = pushing power. The alcohol I linked is a good flush. The caig recommended contact flush is strong, I have used it before ( I don't believe its deoxit brand, but its sold through the caig website). I am just not sure contact cleaner is aggressive enough to clean up the stuff causing your problems (it might be benefit from the slight polarity of alcohol dissolving say capacitor juice), I think its pretty non polar.
You can also try washing it with a clean detergent and a kitchen faucet with some power (the spray nozzle), flush with distilled deoinized water, preferably dip the board in a tub, shake it off, then pour clean water from the bottle, dry, spray with alcohol from a normal spray bottle, dry, bake carefully (don't melt it in a oven like my recent post).. the best would be ultrasonic aqueous detergent followed by a rinse and alcohol flush I think. But keep in mind also someone mentioned some types of capacitors might be susceptible to alcohol, I think the can does a good job because its high power, but not ultra high volume, so it gets it out quickly without too much exposure if you dry it off fast with a strong fan.
Also after alcohol if you get some distilled deionized water and really flush that out, it might reduce any possible alcohol related absorbation damage but not dirty it further (it will tend to dissolve into the water and drip off I think).. then you can hit it with a clean contact cleaner when its dry, I think it does have some action against microcorrosion that developed from the water, so long you determine the contact cleaner is clean enough.
I spend alot of time pressure washing shit because my property is setup kind of fancy and I notice alot with dirt. sometimes you need volume of water more then high pressure to get rid of something for some reason