This has just started happening with my Indesit dishwasher, too, or the door opens at the wrong point so tablet is not utilised properly. Have cleaned the machine to the point of extinction am just trying another wash as I write.....if no replies I guess we are still stuck with it Danny Boy! (Have found an Indesit Helpline tel. no 08701 506 070 which I may try if this wash fails.) Not very helpful but maybe the phone number will be of some assistance!
trish, August 2007