Cleaning could symbolise spiritual cleansing and renewal. Maybe unconsciously you were pulled towards something of inner value, metal is an element that can be tarnished easily, just as our values by negative or toxic people or emotions that distort our well being, if this is not protected and cleansed.
It can make us aware of our own sensitivities or insecurities, metal is a reflector of light, and so it has to be protected within. I read something by Jung where he mentions this reflection of metal as an alchemical symbol, which was a representation of the spirit that fights for the harmony and happiness in one’s life, leading to transformation, inner liberation, and change.
Metal is also a conduit that charges the etheric body, raising to higher states of consciousness, but there is also the symbol of being to overly self-protective, it could also relate to an old way or belief not aligning with you anymore, and that we have to let go of something in order for a new to emerge. Hope this helps.