KIA Sportage - Water in Fuel Filter Light occaisonally comes on -
I drive a 2007 2.0 diesel Sportage. 5000 miles / 4 months ago the water in fuel filter light started coming on occaisionally. I took it to the dealer who drained the fuel filter (he said he could tell whether there was water in it or not). This didn't make any difference to the regularity in which the light comes on. It generally stays on for 15-20 seconds after starting (from either hot or cold) and very occasionally comes on while driving. A couple of times there has been a slight loss of power when it comes on.
Some old threads mention this but nothing in the last few years. Is it worth having th filter/ sensor changed or is it just a nuance which isn't worth bothering about?