Clean it all out, do a hot oil change, look for opportunities to get it fully warmed up regularly. The culprit is likely your driving habits. If you can't drive it enough to get it hot and boil off the condensation, plan for regular maintenance.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue