Can't clear a specific area in my TFT display

Hi I had a problem with my code that have the temperature of two different nanoshields the internal and external , but now I have a new problem, I wanna clear just the old data of both nanoshields because they are overlaping the old ones. I can't take a picture now, but I used tft.fillscreen and the temperature is renovated correctly, but with the background blue. .

This is the code:

#include <TouchScreen.h>
#include <Adafruit_GFX.h>
#include "Nanoshield_Termopar.h"
#include <SPI.h>
#include "Nanoshield_LCD.h"

Nanoshield_Termopar termopar(52 , TC_TYPE_K, TC_AVG_OFF );
Nanoshield_Termopar termopar2(50 , TC_TYPE_K, TC_AVG_OFF );

Nanoshield_LCD lcd;

#define YP A3
#define XM A2
#define YM 9
#define XP 8

#define TS_MINX 90
#define TS_MINY 92
#define TS_MAXX 906
#define TS_MAXY 951

TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);

#define LCD_RESET A4
#define LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0

#define PRETO   0x0000
#define BRANCO 0xFFFF
#define AMARELO 0x0ff00
MCUFRIEND_kbv tft;

#define MINPRESSURE 10
#define MAXPRESSURE 1000

bool error = false;
bool valor_botao1 = false;
bool valor_botao2 = false;

void telaInicial();
void setup() {

  Serial.begin(9600);
  termopar.begin();
  termopar2.begin();
  uint16_t ID = tft.readID();
  tft.begin(ID);
  tft.setRotation(1);
  tft.fillScreen(BRANCO);
  lcd.begin();

  telaInicial();
}

void loop() {
  delay (1500);
  termopar.read();

  tft.setTextColor(BRANCO);

  tft.setCursor (200, 60);
  tft.print(termopar.getInternal());

  Serial.println (termopar.getExternal());
  Serial.println ("");
  tft.setCursor (200, 180);
  tft.print (termopar.getExternal());

  Serial.println (termopar.getExternal());
  Serial.println ("");

  termopar2.read();

  tft.setTextColor(BRANCO);

  tft.setCursor (200, 30);
  tft.print(termopar2.getInternal());

tft.fillScreen(termopar2.getInternal());

  Serial.println (termopar2.getInternal());
  Serial.println ("");

  tft.setCursor (200, 150);
  tft.print (termopar2.getExternal());

  Serial.println (termopar2.getExternal());

  delay (1000);

  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");
  Serial.println ("");


}

void telaInicial() {
  tft.setRotation(3);
  tft.fillScreen(BRANCO);

  criarBotao(186, 130, 105, 95, "", PRETO);
  criarBotao(186, 10, 105, 95, "", PRETO);
  criarBotao(20, 10, 105, 95, "", PRETO);
  criarBotao(20, 130, 105, 95, "", PRETO);
  escreveEstado(32, 50, "Temp_1", BRANCO);
  escreveEstado(32, 170, "Temp_2", BRANCO);
  escreveEstado(140, 30, "Ext:", AMARELO);
  escreveEstado(140, 60, "Int:", AMARELO);
  escreveEstado(140, 150, "Ext:", AMARELO);
  escreveEstado(140, 180, "Int:", AMARELO);
}

void escreveEstado(int posx, int posy, String texto, int cor) {
  tft.setCursor(posx, posy);
  tft.setTextColor(cor);
  tft.setTextSize(2);
  tft.print(texto);
}

void criarBotao(int posx, int posy, int largura, int altura, String texto, int cor) {
  tft.fillRect(posx, posy, largura, altura, cor);
  tft.drawRect(posx, posy, largura, altura, PRETO);
  tft.setCursor(posx + 12, posy + 1000);
  tft.setTextColor(BRANCO);
  tft.setTextSize(3);
  tft.print(texto);
}
void atualizarBotao(int posx, int posy, int cor) {
  tft.fillRoundRect(posx, posy, 210, 48, 5, cor);

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