public function update( $new_instance, $old_instance ) {

		$instance = $old_instance;

		if ( empty( $this->settings ) ) {
			return $instance;
		}

		// Loop settings and get values to save.
		foreach ( $this->settings as $key => $setting ) {
			if ( ! isset( $setting['type'] ) ) {
				continue;
			}

			// Format the value based on settings type.
			switch ( $setting['type'] ) {
				case 'number':
					$instance[ $key ] = absint( $new_instance[ $key ] );

					if ( isset( $setting['min'] ) && '' !== $setting['min'] ) {
						$instance[ $key ] = max( $instance[ $key ], $setting['min'] );
					}

					if ( isset( $setting['max'] ) && '' !== $setting['max'] ) {
						$instance[ $key ] = min( $instance[ $key ], $setting['max'] );
					}
					break;
				case 'textarea':
					$instance[ $key ] = wp_kses( trim( wp_unslash( $new_instance[ $key ] ) ), wp_kses_allowed_html( 'post' ) );
					break;
				case 'checkbox':
					$instance[ $key ] = empty( $new_instance[ $key ] ) ? 0 : 1;
					break;
				default:
					$instance[ $key ] = isset( $new_instance[ $key ] ) ? sanitize_text_field( $new_instance[ $key ] ) : $setting['std'];
					break;
			}

			/**
			 * Sanitize the value of a setting.
			 */
			$instance[ $key ] = apply_filters( 'woocommerce_widget_settings_sanitize_option', $instance[ $key ], $new_instance, $key, $setting );
		}

		$this->flush_widget_cache();

		return $instance;
	}