EFOY ProFuelBox User Manual page 52

Impurities or foreign components in commercial methanol will damage the
EFOY fuel cell.

Only use original EFOY fuel cartridges approved by SFC Energy AG.

Regularly check the fuel cartridge connection for proper function.

Always use the EFOY fuel cartridge upright during operation.
Lift the cap of the EFOY fuel cartridge to reseal the EFOY fuel cartridge when
you remove it.
Page 52
Service and maintenance