Long before Tim Cook became Apple's boss, when his job was to wring costs out of the company's supply chain, he learned of a problem with a supplier in China.
He merely took the handker chief and kept on using it, wringing it out with both hands whenever it got too wet to be any more use, so that presently Lucy was standing in a damp patch.
I don't know whether your mother has one of these in her small laundry but if ever see you using a box mangle to wring out excess water you will be instantly dismissed.
After ten minutes, rinse the sweater until the water runs clear, then gently squeeze out excess moisture using your hands (never wring out wool or similar fabrics).
I'm sure you're quite aufait with wringing out excess water but you may well find that this mangle helps you in that process. Always be sure to use a mangle cloth.