Why do they make these travel mug lids so hard to clean? The rubber seal doesn't even come out.

How to say “Why do they make these travel mug lids so hard to clean? The rubber seal doesn't even come out.” in French

In French

Pourquoi ils font des couvercles de mug isotherme aussi difficiles à nettoyer ? Le joint ne s'enlève même pas.

Why do they make these travel mug lids so hard to clean? The rubber seal doesn't even come out. in other languages