Dificult Engine start when hot!

Hi! My seat ibiza TDi starts whery nice when the engine is cold! 2 seconds and it starts. After doing a trip for 30 minutes... if i stop and then whit a hot engine i start it... it takes up to 10 seconds until it starts!
What could be the problem?

Thank you!

Some PD TDI's here in the US had problems with the computer that would cause difficult hot starts. What year is your Seat, what type of engine? The dealer can reprogram the computer and that may take care of the problem. That is assuming that your Ibiza is anything like what we have here in the states.