Q: Here is a goal: buttermilk substitution

How would you accomplish this goal?

A: add vinegar or lemon juice to an equal amount of milk. let stand.

Q: Here is a goal: How to keep the airflow vent on a fan clean from obstruction?

How would you accomplish this goal?

A: Purchase a can of concentrated air and carefully place the nozzle just short of the vent, spray until dust is removed.

Q: Here is a goal: washable paint

How would you accomplish this goal?

A:
can cover a hole from a screw