1.   The once razor sharp blades have been replaced by wooden ones tipped with rubber.

2.   The blade should be replaced as soon as it dulls.

3.   A badly warped blade must be replaced, Elworth said.

4.   For electric lawn mowers, clean the underside and body as described earlier and sharpen or replace the blade as needed.

5.   If you replace the blade, is it the same ax?

6.   If they become dull, some blades may be replaced, others removed and sharpened.

7.   Sharpen or replace the blade, empty the gas tank and detach the spark plug wire.

8.   Wiper blades should be replaced at least once a year.

9.   Wiper blades should be replaced every six months, or more often if needed.

10.   All blades would be replaced as a safety precaution, the statement said.