Earlier I've been using Tetenals E6 kit with satisfaction, but last time I decided to pick up the Kodak E6 single-use kit just to try it out (mostly because I've read that it's superier to the Tetenal kit).

The problem I see though is that my slides turn out rather dark. I've just started to increase the development time slightly, but I don't really see any difference.

I use a Jobo ATL-1500 to process the film, and I try to make sure the temperature of the first was is 38 degrees. Will wash water-temperature affect the density of my slides? I use the standard times for a rotary processor mentioned in the manual.

Anyone got any ideas what might be wrong here?

The Tetenal slides are bright and nice.