Put on wife's washing up gloves.
.
Cut up wife's best T-shirt in to a square.
.
Hold wife's T-shirt in left hand and poor generously wife's baby oil onto T-shirt.
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Grab lower chain and roll wheel backwards through oil-sodden T-shirt.
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Repeat until nice 'n clean / oily.
.
Put wife's T-shirt and gloves back.
.
Deny all knowledge when questioned about above mentioned shredded Givenchy rag.
.
Simples....