Grundfos oven and microwave combination condensation leaking when using oven

I have had an ikea combination oven / microwave which I believe is made by Electrolux for around 6 years. Now when I use the oven condensation in the door is leaking from the door and running out from the bottom onto the control panel of the main oven below and pooling on the floor. Is this fixable or am I looking at a new combination oven. There is no reference to this problem in the documentation. Do I need to get in a qualified person or can I solve it myself subject to obtaining any spare parts. Thanks