Heat up a fuzz pedal enough and it will get a "spitty" or "fizzy" sound . Keeping germanium transistors cool is important because germanium transistors, unlike silicon transistors, have a lower bandgap and are more susceptible to temperature fluctuations. This means their electrical characteristics, such as gain and leakage current, can change drastically with even small temperature variations making it difficult to maintain a stable bias.  The FreezeZone pedal is biased at a lower fixed temperature and stays that way in use. The FreezeZone pedal does have a voltage starving dial "bias" to increase fuzz, compression, and gated sounds. With the fuzz dial at maximum, the FreezeZone pedal does clean up if placed first in your pedal board.