Here are some of the best materials that you should use Cleaning swabs They make it easy for you to clean connector endfaces inside mating sleeves, bulkheads and other recessed areas. They come in two main sizes that you can go for: 1.25 mm and 2.5 mm.
They are of many types such as wrapped, foam and general purpose cotton swabs. It’s up to you to choose the one that is right for your needs. Isopropyl alcohol Isopropyl alcohol is effective in getting rid of oils, dirt and other signal impeding contaminants.