When I "Pull to refresh", How I clean the Cache?

ionic-v1
1

I have a problem, I’m using a JSON coming from an external server, but when I do “Pull to refresh” or when I open the application, displays the same information I downloaded the first time the application is opened. It may be that the JSON is being stored in the cache and therefore not update? For if when I go to on-refresh = “doRefresh ()” and called another JSON, (the first time I do), update, but re-enter the application I load the information from the first JSON and if I want update, showing me the information I also downloaded the first time. This will fix manually deleting the application data, but it is not the best way …

This is my services.js

angular.module('starter.services', ['ngResource'])

    .factory('NotasService', ['$http',
        function ($http) {
        
            var items_nota = [];
            var items_nota_array;
            
            return {

                all: function () {
                    return $http.get('http://192.168.1.0:8100/wp-json/posts?filter[post_status]=publish&filter[posts_per_page]=30')
                    .success(function(data, status, headers, config){
                      console.log("**** SUCCESS ****");
                      console.log(status);
                    })
                    .error(function(data, status, headers, config){
                      console.log("**** ERROR ****");
                      console.log(status);
                    })
                    .then(function(response){
                      console.log("**** THEN ****");
                        
                            items_nota = response;
                            return items_nota;

                      
                      }
                    )
                },
                get: function (notaId) {
                    // Simple index lookup
                    var pepe = parseInt(notaId);

                    var ESTO = 0;

                    var addToArray = true;
                    for (var i = 0; i < items_nota.length; i++) {
                        if (items_nota[i].id == pepe) {
                            addToArray = false;
                            ESTO = i;
                        }
                    }


                    return items_nota[ESTO];
                }

            }
    }])

This is my controller.js…

.controller('ActulidadCtrl', function ($q, $scope, NotasService, $timeout) {
            
            var items_nota;

            NotasService.all().then(function (data) {
                $scope.items_nota = data;
            })

            //Pull tu refresh
            $scope.doRefresh = function () {
                console.log('Actualizando!');
                $timeout(function () {
                    //NotasService.loadData().then(function (data) {
                    NotasService.all().then(function (data) {
                        $scope.items_nota = data;
                    })
                    
                    //Stop the ion-refresher from spinning
                    $scope.$broadcast('scroll.refreshComplete');

                });

            };
        })

Thanks! and Happy new year!