It was a normal hot day planet earth, A bit too Hot for your liking.

You were filling up a bucket with water mixed with a soft soap for Bumblebee's bath/car cleaning, He was very sensitive and reacted to the previous soaps you washed him against his chassis & other parts of his body, but you were extra cautious this time.

"C--Careful on my Chassis!" Bumblebee whined, as his gears slightly twitched at the contact of the rag rubbing against his chest.