It helps to clean them after every ride. Not some big heavy duty cleaning, just a wipe down with a damp cloth, with maybe a little dishwashing liquid. I do that as a matter of course, along with a damp cloth wipe of the bike and a cog/cassette wipedown.
If it's really bad, I start with some Simple Green. Then a damp cloth, followed by a damp cloth with a little window cleaner or dishwashing liquid, then another water dampened cloth.
Right now I am using the Specialized gel-tape, it is holding up well, which is bad because I can't stand it, it's too thick. Deda tape is much thinner and easier to get my hands around. Lizard Skins is between the two, and held up ok but didn't clean up as easily as the Specialized tape.
Every time I spend the time to clean my bar tape, I think I should switch to red (bike is red and white) but the saddle is white and red bar tape just won't do.
Tzvia- rollin' slow...
Specialized Ruby Expert/mens Bontrager Inform RXL
Specialized SWorks Safire/mens Bontrager Inform RL
Giant Anthem-W XT-XTR/mens Bontrager Inform RXL
Fuji Newest 3 commuter/mens Bontrager Inform RL
Novara E.T.A commuter/mens Bontrager Inform RL