Anyone daft enough to have one of those ugly things would have a hard water softner fitted. Three stage unit would do the job. A magnetic passive unit at water point of entry, an electronic limescale reducer softner that and then an electronic salt-fed water softener at the final stage.

The fourth stage is a housemaid paid at subsistence wages to keep it clean.

PS Vinegar is just as good for cleaning Limescale as anything else on the market.