Flux. Flux pen or whatever PCB-stuff you have.
Closely spaced componenets need flux or all soder runs together and takes way too long to heat up pads/pins without it.
Pekka
Which is what he's trying to avoid...
I suggested Tippex but I've never tried it myself but have heard it works... 
Good thing that the job got done.
I think you are confusing conventional terminology and processes with PCB/Electronics soldering.
To avoid the mess, flux made for electronics should be used. It doesn't only "wet" the solder, but does its part to prevent bridging. Less solder also helps. There are laquers to help soldering process and some kit/ready made PCBs may have it.
I use Multicore 6381:
http://krayden.com/tds/henk_multicore_6381_tds.pdfBut there are very many same kind of products that would work. Only trouble is that there are many different needs and process, so which one to choose.
This should be pretty much foolproof for fixing stuff and manual soldering of small components:
http://www.stannol.de/WS_Flux/TDB_HP_Fine_Fluxer_3000+_EN.pdfRest is YouTube tutorials, they are pretty long, but information packed:
Here is a right way to solder small component:
&NR=1
This is very good, many different techniques:
&feature=fvwrel
This is OLD:
But works very well on old stuff and leadbased solders.
I could not find the one video that had all wrong. The guy did not clean PCB (isopropyl alcohol), did not use flux, had too small iron and dwell over every leg too long.
Pekka