I’d say yes, as it needs to hit quite a threshold to be audible, if part of the Faraday has rusted out then you’re sending ionising radiation around your kitchen. For the £50-100 to replace it, it’s not worth messing with, just change it.
Fwiw, spend the extra £20 and get a Panasonic one, of all the consumer durables I’ve ever owned, these have lasted the longest.