We bought a Bosch cookerhood DUL63CC50B for £119. The cookerhood is great. But there are two metal mesh filters inside which looked flimsy. The instructions say we can use dishwashers for the cleaning of the mesh. But I am worried that these mesh might not last very long if we did that. So I decided to buy two extra mesh filters. I contacted Bosch and the price for 1 of these mesh filters is £74.53. So two of them will cost more than the original price of the cookerhood. Is this logical???