Speedfight 3 Tacho spins suddenly (after laundry?)

Hello everyone 🙂 I have a problem. And I just cleaned up my speedfight 3 in an SB washing machine and as far as everything was good. After 5-10 minutes driving the speedometer suddenly starts to play crazy, goes out within seconds and, everything flashes, speed shows me everything possible from 0-199 although I drive normally 30. Also in the stand, partly that I drive 20 although I stand as I said. Now this is almost two hours ago and it is now „etw because now it’s also on and it stays, besides, no lights of all lamps. However, I’m still shown a completely different KM/H number than the ones I really drive. I’ve only driven a few KM now and that’s the last one. Could be that everything would have gone off and off again with a further ride. Now my question, what can that be? I know that the battery is very weak and the scooter after a lifetime of a few hours would have been r with the kickstarter (battery is changed on Monday anyway). But can it be because of the battery, if the scooter is already running and this is also charging itself during the ride? I have of course the strong fear that water has come in somewhere and therefore the tacho spins so. In addition, I have to mention that the turn signals, light etc. everything is off and turn on. Can anyone say anything to me here?