Read from InputStream causes OutOfMemoryError

My app connects to a Wi-Fi peripheral. I’m using Socket.getInputStream() and Socket.getOutputStream() to read/write data. When the connection is established I store these two streams so that I can reuse them as long as I’m connected. My app sends a command via the OutputStream every second and reads the result from the InputStream by its read() method. After some time I get an "OutOfMemoryError". Correct me if I’m wrong but I think this is because read() does not remove the read data from the InputStream, right?

My question is: Is it a good practice to store the Streams? Or should I use Socket.getInputStream(), Socket.getOutputStream() every time I send a new command?

It seems not to be a problem with the OutputStream since I can call flush() for that. What about reset() of InputStream? Does this remove the data for the stream?

Here is the code how I encapsulate my Streams:

@Override
public InputStream getInputStream() throws IOException {
    return _Socket.getInputStream();
}

@Override
public OutputStream getOutputStream() throws IOException {
    return _Socket.getOutputStream();
}

@Override
public void connect() throws IOException {
    try {
        SocketAddress socketAddress = new InetSocketAddress(_ip, _port);

        _Socket = new Socket(_ip, _port);
    } catch (IOException e) {
        MyExceptionHandler.appendLog(MyExceptionHandler.exceptionToString(e));

        throw e;
    }
}

The code for sending and receiving commands comes from this api:

https://github.com/pires/obd-java-api/blob/master/src/main/java/com/github/pires/obd/commands/ObdCommand.java

The exception does also not come immediately. It occurs after ~30 Minutes and a lot of commands sent/received