The cabinet surface usually only requires dusting. After the first 6 months if your speaker has a wooden surface, could be necessary to oil them lightly. Please use a soft towel light damped with a special wood-hardening-oil. First distribute a subtle quantity of oil and then wipe the excess in the wood. Leave it drying overnight. Avoid touching the drive units, as damage may result, which is not covered by warranty.
This is what we use in the production for surface treatment