Just a little common sense....
Would you agree most appliances have improved over the last 50 years? How many dryer fires have you personally been within 50 miles of during the last 50 years? Would you agree your house has fewer occupants than 50 years ago?
My 13 year old home dryer vent, here at TV Panic Central, was just "cleaned" Top (roof) to bottom. 2 people living here, a visiter or 2 per year and yet.... less than 1/2 a small zip baggy of lint recovered.
Do it if it makes you feel safer. Cleaning the dryer mesh after every usage is plenty for me.
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