Spot the entry point
Take the wheel off the bike and lay it down drive side up. Spin the cogs anti-clockwise, identify the circular line between the spinning cog or cogs and static element of the bike freewheel.
Lubricate bike freewheel
Drip a few drops of lubricant along the gap between the spinning and still elements of the bike freewheel. Gravity will help them flow into the bike freewheel mechanism.
Replace the wheel back onto the bike.