the last thing you want is oil splashing onto your wheels rim or disk brake rotors – as this will lead to dangerous brake failure 

place a piece of cardboard between the chain and your back wheel

place nozzle of chosen lube onto chain (only bottom section – as only this touches cogs)  slowly turn pedals backwards and squeeze container gently to evenly apply oil to every link.

wipe any excess lube off with a tissue / cloth and carefully remove the cardboard.