Cheapest way to move Weth from Polygon network to Eth Network (metamask)

i've got some WETH on my polygon metamask, and im looking to move it across to my Eth wallet (same address) metamask so i can get some NFT's on opensea.
the only way i know how to do this is Anyswap, but they're charging 0.02 eth for the swap ($75)
there MUST be a cheaper way to go about this?
if anyone knows please could you advise, im quite new to metamask and using crypto outside of binance / kucoin etc.. so any advise on minimizing then damage is appreciated.

Thanks