If you silk bed sheets of silk clothing have strong odor, even like fish, then what you bought are fake silk or low quality silk fabric made of non-mulberry silk fibers.
Silk fabric made from real mulberry fiber is of very little smell that you can’t notice generally, like a little bit of fragrance.
In case you bought a “silk” garment made from low quality silk fiber, with strong smell, hand-wash it with neutral or special detergent for silk, in cold water. This should generally remove the smell.
If not, then you are buying a fake silk garment, ask for return or refund.
Feel free to try our mulberry silk sleepwears, they won’t have strong smell.