JBL bluetooth headphones have "firmware feature" which lowers volume of left earpiece slowly over time. Happened on multiple different products, bought by scho

JBL bluetooth headphones have "firmware feature" which lowers volume of left earpiece slowly over time. Happened on multiple different products, bought by schoolmates of mine and also on 3 different units of one product for me. Pioneer SE-M531, M521 .... have similar problem with screws as you state. logitech - i absolutely LOVE MX series of products they are innovative and provide absolutelly best functionality, keys look nice not really my style but they look nice as a unit. so i am sad to see they jumped on mechanical keyboard bandwagon, i hate mechanical keyboards with all my life. always clicking, long travel, slow typing....