Before puberty, occasional cleaning is recommended.

Even occasional cleaning would have prevented the outbreak.

But because they require occasional cleaning with mild detergent, you could always use them to sing in the shower.

When the bulb has a protective cover or is not operated daily occasional cleaning is required.

A painting may require the occasional cleaning, but software-based art could demand a complete overhaul on a regular basis.

Like styluses, the tape heads inside a recorder require occasional cleaning.

It will mean occasional cleanings of the combustion chamber, as we have explained to you.

Revolving lawn sprinklers seldom need maintenance beyond occasional cleaning, but oscillating sprinklers require more care.

But once the pit was dug, it could be used many times, only requiring an occasional cleaning out of ashes.

As a result, the tape heads will require occasional cleaning to remove such particles.