Bosch, I have a family in Germany and most of their friends have had hair dryers there for a long time. All of them were without pump, Miele and most of them fire escape. Indeed, for them it is the basis and they are satisfied with them, nevertheless each of them used them with prudence and they dried a lot on a string, because each of them admitted that a lot of things were not suitable for the dryer. Thus, they had to wash in 3 washing machines, for example, they had a lot of laundry hanging up. I know you're headed to the fact that maybe Bosch does, I don't know, I don't argue. But I wouldn't believe that two major companies specializing in household appliances would have that too. I price my dryer for the fact that without much thought I throw everything into it without any losses. Do you also dry in your shirts, suit pants or some delicate formal dresses? If so, you are actually lucky with your dryer
I will add that I was drying even woolen sweaters and nothing happened to them, they got a second life. I think that most of the equipment nowadays will serve us for 5-6 years, and during this time I will have to clean it once, I think it will survive, worse if I had to do it non-stop, you would actually have to think about it. So far, everything works flawlessly, the drying time has not been extended by a minute and I hope that this condition will last as long as possible

