Adding on/off button functionality to bluetooth servo.

Hello,
Thanks in advance for being here. The title pretty much says it. What the situation is. I have the Bluetooth servo setup going no problem.
However. One of the servos is set for continuous rotation. it will not stay at a halted position for long. It will stop. but i guess the tiny bit of
miscommunication is causing it to drift and start moving. Im wondering how can I add a button to this sketch that will turn that pin/servo off.
getting it setup in MIT app inventor I think I can handle. It is the code that is killing me. I have tried a bunch of stuff, no luck. Here is the code
I am working with:

(this code is setup and working properly, I just need to devise a way to make that one servo stop completely.)

#include <SoftwareSerial.h>

#include <Servo.h>
Servo myservo1, myservo2, myservo3, myservo4, myservo5, myservo6;

int bluetoothTx = 7;
int bluetoothRx = 8;

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup()
{
myservo1.attach(9);
myservo2.attach(10);
myservo3.attach(11);
myservo4.attach(3);
myservo5.attach(5);
myservo6.attach(6);
//Setup usb serial connection to computer
Serial.begin(9600);

//Setup Bluetooth serial connection to android
bluetooth.begin(9600);
}

void loop()
{
//Read from bluetooth and write to usb serial
if(bluetooth.available()>= 2 )
{
unsigned int servopos = bluetooth.read();
unsigned int servopos1 = bluetooth.read();
unsigned int realservo = (servopos1 *256) + servopos;
Serial.println(realservo);

if (realservo >= 1000 && realservo <1180){
int servo1 = realservo;
servo1 = map(servo1, 1000,1180,0,180);
myservo1.write(servo1);
Serial.println("servo 1 ON");
delay(10);

}

if (realservo >=2000 && realservo <2180){
int servo2 = realservo;
servo2 = map(servo2,2000,2180,0,180);
myservo2.write(servo2);
Serial.println("servo 2 On");
delay(10);

}

if (realservo >=3000 && realservo < 3180){
int servo3 = realservo;
servo3 = map(servo3, 3000, 3180,0,180);
myservo3.write(servo3);
Serial.println("servo 3 On");
delay(10);
}
if (realservo >=4000 && realservo < 4180){
int servo4 = realservo;
servo4 = map(servo4, 4000, 4180,0,180);
myservo4.write(servo4);
Serial.println("servo 4 On");
delay(10);
}

if (realservo >=5000 && realservo < 5180){
int servo5 = realservo;
servo5 = map(servo5, 5000, 5180,0,180);
myservo5.write(servo5);
Serial.println("servo 5 On");
delay(10);
}

if (realservo >=6000 && realservo < 6180){
int servo6 = realservo;
servo6 = map(servo6, 6000, 6180,0,180);
myservo6.write(servo6);
Serial.println("servo 6 On");
delay(10);
}

}


}

I'm sure the ways I tried where plenty ignorant. So I won't bother to add that info. However I did find this bit of code that I was trying to utilize:\

String voice;
void setup() {
pinMode(13, OUTPUT);
Serial.begin(9600);
}
void loop() {
while (Serial.available())
{
delay(10);
char c = Serial.read();
voice += c;
}
if (voice.length() > 0)
{
Serial.println(voice);
if(voice == "on")
{
digitalWrite(13, HIGH);
}
if(voice == "off")
{
digitalWrite(13, LOW);
}
voice="";
}
}

I know someone is going to say this is easy. I simply am not knowledgeable enough yet. I am working on it!