This is what I recommend. https://www.amazon.com/dp/B015PK3CHC/ref=cm_sw_em_r_mt_dp_T9CJJFJYS9HDMFB151RC
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This is a cheap Drexel to use for brushes. Works great on light sockets and switch contacts. https://www.amazon.com/dp/B003TU0XG4/ref=cm_sw_em_r_mt_dp_R2EYZ9GHMWP4CPT5GTJE
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