Cutting Lubricant Stick – 1lb for Smooth Cuts & Heat Dispersion, Sawblade Lubricant, Easy Tool Maintenance, Solid Lubrication

Sorry I forgot to paste it in. This is the one I bought: https://www.amazon.com/dp/B07H8PFSNY?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4 There are several brands. You just need a small amount on the whole circumference on each side of the blade. I had to reapply it every 20 or so cuts. Also, I recommend wrapping the end of the channel in blue painter’s tape. It helps the diffusion channel not splinter or crack as easily.