For ovens that are used regularly, a general rule of thumb is to scrub the oven and its racks:once every 3 months.once every 6 months.once every 12 months.

When it comes to maintaining an oven, it's essential to follow a structured cleaning routine to ensure its longevity and optimal performance. The general recommendation for scrubbing an oven and its racks is to do so at least once every 3 months. Regular cleaning helps to prevent the buildup of grease and food residues, which can lead to unpleasant odors, decreased efficiency, and even the risk of fire hazards.

Here’s a clearer breakdown of the suggestion:

1. Frequency: Cleaning the oven every three months is ideal for regular use. This is particularly important in households where the oven is used frequently for baking or roasting.

2. Maintenance: By adhering to this schedule, you minimize the risk of grease buildup, which can affect the oven's functionality and flavor of the food being cooked.

3. Alternative Options: If the oven is used less frequently, cleaning every six months might be sufficient. However, for optimal performance and hygiene, quarterly cleaning is advised.

In conclusion, for regularly used ovens, scrubbing them every three months is the best practice for maintenance and hygiene.