i would wash the LC in hot soapy water,  then scrub all around that big  group of 10uf caps there…  and try to scrub under the I/C;s around there too, with the bristles of the tooth brush,  i bet you have some cap goo some where.

then rinse again with hot water… and compressor dry off.

i'v had some LC boards do that after a re-cap, that is half of the reason i pretty much wash/scrub all boards after i remove the caps and clean the pads.