To fix the "hot" problem, you must identify which plague your dongle suffers from.
Not every hot CX31993 is broken. The datasheet allows for junction temperatures up to 125°C. If your device meets the following, the heat is normal: cx31993 datasheet fix hot
is a highly integrated, single-chip USB audio CODEC. It features: Audio Expansion Card - CX31993 Datasheet To fix the "hot" problem, you must identify
is notoriously difficult as Conexant (now part of Synaptics) often keeps these documents private. Confirmed Specs: amplifier chip. Technical Limitation: To fix the "hot" problem