I would invest in a flat surface mat for whatever deck you are using. There are tons of them on the market. You can't go wrong with the Gyromat from the Michell Gyrodeck. Available as an accessory. Looking forward the mat on the Thorens is a travesty , and in parallel I would always break the rules and ditch the felt mat on Linn in favour of the Gyro or similar. The Gyromat washes OK whereas some of the tacky ( sticky ) rubber mats would retain grit.