A thermal print head degrades after 50-100km of printing. A worn head requires more power to print the same darkness, generating excess heat. If your WSPL printer is 3+ years old in a high-volume environment, replace the head.
If you meant as in "Hot-Pluggable" (Hot-Swappable), the feature set would include: wspl printer driver hot
The most frequent culprit. Windows caches print jobs in C:\Windows\System32\spool\PRINTERS . A single corrupted .SPL or .SHD file can send the WSPL processor into an infinite loop, generating heat and high CPU. A thermal print head degrades after 50-100km of printing