Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to apply deoxit [title] Purchase the right type of deoxit for your application. [step] Deoxit is manufactured in over a dozen varieties, so you should read carefully about the uses of each type before your purchase. For cleaning and lubricating potentiometers (" pots ") or contacts, the standard " d5 " spray should be used.

Ending1: Other formulations are available for more specialized applications, though, such as cleaning gold or conductive plastics. [title] Remove the case from your receiver or amplifier. Ending2: For lubricating contacts, the standard " d5 " spray should be used. For lubricating contacts, the standard " d5 " spray should be used. Ending3: For pricier projects, it should be used at all times. [substeps] Deoxit is good for light and well-balanced projects. Ending4: [title] Test the area and spray a little to see what your reaction is like. [step] Examine your product components and appliances for any potential problems.

Answer format: ending1/ending2/ending3/ending4