How to reset equities added for each day

class MyAlgorithm(QCAlgorithm):
    def initialize(self):
        self.set_start_date(2022, 1, 1)
        self.set_end_date(2022, 12, 31)
        self.set_cash(100000)
        self.securities_to_remove = set()
        self.schedule.on(self.date_rules.every_day(), self.time_rules.after_market_open(), self.update_universe)

    def update_universe(self):
        # Remove previous day's securities
        for symbol in self.securities_to_remove:
            self.remove_security(symbol)
            self.liquidate(symbol)

        # Clear the list of securities to remove
        self.securities_to_remove.clear()

        # Add current day's securities
        current_symbols = self.get_current_day_symbols()
        for symbol in current_symbols:
            self.add_equity(symbol)
            self.securities_to_remove.add(symbol)

    def get_current_day_symbols(self):
        # Replace with your logic to get the list of symbols for the current day
        return ["AAPL", "GOOG", "MSFT"]

    def on_data(self, slice):
        pass

Sources: Add Remove Security Regression Algorithm, Key Concepts - QuantConnect.com, User Defined Universe Algorithm, Seasonality Effect Based On Same Calendar Month Returns, Liquidating Positions - QuantConnect.com