Review on 🔊 Arsvita Cassette Head Cleaner with Enhanced Audio Performance by Daniel Mandal

My car radio sounded very muffled (only when playing cassettes, not the radio, so I knew it was a tape recorder). At first I thought I had bad cassettes, but lately some of them have been doing well so I thought the head was dirty. I've only run this once (I played both sides, about 20 seconds each side) and now the tapes play fine. Better than before, it began to sound dull. I've read that some people say the liquid container was empty. I thought the same. It's not empty; In fact, it is so filled with liquid that no air can be seen inside. You need to make a hole in the container,