diff --git a/includes/wc-term-functions.php b/includes/wc-term-functions.php
index 115ccd992cc..d36ff54b6a0 100644
--- a/includes/wc-term-functions.php
+++ b/includes/wc-term-functions.php
@@ -623,3 +623,43 @@ function wc_change_term_counts( $terms, $taxonomies ) {
 	return $terms;
 }
 add_filter( 'get_terms', 'wc_change_term_counts', 10, 2 );
+
+/**
+ * Return products in a given term, and cache value.
+ *
+ * To keep in sync, product_count will be cleared on "set_object_terms".
+ *
+ * @param int $term_id
+ * @param string $taxonomy
+ * @return array
+ */
+function wc_get_term_product_ids( $term_id, $taxonomy ) {
+	$product_ids = get_woocommerce_term_meta( $term_id, 'product_ids', true );
+
+	if ( false === $product_ids || ! is_array( $product_ids ) ) {
+		$product_ids = get_objects_in_term( $term_id, $taxonomy );
+		update_woocommerce_term_meta( $term_id, 'product_ids', $product_ids );
+	}
+
+	return $product_ids;
+}
+
+/**
+ * When a post is updated and terms recounted (called by _update_post_term_count), clear the ids.
+ * @param int $term_id
+ * @param int    $object_id  Object ID.
+ * @param array  $terms      An array of object terms.
+ * @param array  $tt_ids     An array of term taxonomy IDs.
+ * @param string $taxonomy   Taxonomy slug.
+ * @param bool   $append     Whether to append new terms to the old terms.
+ * @param array  $old_tt_ids Old array of term taxonomy IDs.
+ */
+function wc_clear_term_product_ids( $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids ) {
+	foreach ( $old_tt_ids as $term_id ) {
+		delete_woocommerce_term_meta( $term_id, 'product_ids' );
+	}
+	foreach ( $tt_ids as $term_id ) {
+		delete_woocommerce_term_meta( $term_id, 'product_ids' );
+	}
+}
+add_action( 'set_object_terms', 'wc_clear_term_product_ids', 10, 6 );
diff --git a/includes/wc-user-functions.php b/includes/wc-user-functions.php
index 1421b6700f3..448b24aebb3 100644
--- a/includes/wc-user-functions.php
+++ b/includes/wc-user-functions.php
@@ -206,10 +206,8 @@ function wc_paying_customer( $order_id ) {
 }
 add_action( 'woocommerce_order_status_completed', 'wc_paying_customer' );
 
-
 /**
- * Checks if a user (by email) has bought an item.
- *
+ * Checks if a user (by email or ID or both) has bought an item.
  * @param string $customer_email
  * @param int $user_id
  * @param int $product_id
@@ -252,11 +250,11 @@ function wc_customer_bought_product( $customer_email, $user_id, $product_id ) {
 			AND im.meta_value != 0
 			AND pm.meta_value IN ( '" . implode( "','", $customer_data ) . "' )
 		" );
-		$result = array_map( 'intval', $result );
+		$result = array_map( 'absint', $result );
 
 		set_transient( $transient_name, $result, DAY_IN_SECONDS * 30 );
 	}
-	return in_array( (int) $product_id, $result );
+	return in_array( absint( $product_id ), $result );
 }
 
 /**
diff --git a/includes/widgets/class-wc-widget-layered-nav.php b/includes/widgets/class-wc-widget-layered-nav.php
index 82f15fff62a..26abf96bad3 100644
--- a/includes/widgets/class-wc-widget-layered-nav.php
+++ b/includes/widgets/class-wc-widget-layered-nav.php
@@ -187,17 +187,9 @@ class WC_Widget_Layered_Nav extends WC_Widget {
 							continue;
 						}
 
-						// Get count based on current view - uses transients
-						$transient_name = 'wc_ln_count_' . md5( sanitize_key( $taxonomy ) . sanitize_key( $term->term_taxonomy_id ) );
-
-						if ( false === ( $_products_in_term = get_transient( $transient_name ) ) ) {
-
-							$_products_in_term = get_objects_in_term( $term->term_id, $taxonomy );
-
-							set_transient( $transient_name, $_products_in_term, DAY_IN_SECONDS * 30 );
-						}
-
-						$option_is_set = ( isset( $_chosen_attributes[ $taxonomy ] ) && in_array( $term->term_id, $_chosen_attributes[ $taxonomy ]['terms'] ) );
+						// Get count based on current view
+						$_products_in_term = wc_get_term_product_ids( $term->term_id, $taxonomy );
+						$option_is_set     = ( isset( $_chosen_attributes[ $taxonomy ] ) && in_array( $term->term_id, $_chosen_attributes[ $taxonomy ]['terms'] ) );
 
 						// If this is an AND query, only show options with count > 0
 						if ( 'and' == $query_type ) {
@@ -245,16 +237,8 @@ class WC_Widget_Layered_Nav extends WC_Widget {
 				foreach ( $terms as $term ) {
 
 					// Get count based on current view - uses transients
-					$transient_name = 'wc_ln_count_' . md5( sanitize_key( $taxonomy ) . sanitize_key( $term->term_taxonomy_id ) );
-
-					if ( false === ( $_products_in_term = get_transient( $transient_name ) ) ) {
-
-						$_products_in_term = get_objects_in_term( $term->term_id, $taxonomy );
-
-						set_transient( $transient_name, $_products_in_term );
-					}
-
-					$option_is_set = ( isset( $_chosen_attributes[ $taxonomy ] ) && in_array( $term->term_id, $_chosen_attributes[ $taxonomy ]['terms'] ) );
+					$_products_in_term = wc_get_term_product_ids( $term->term_id, $taxonomy );
+					$option_is_set     = ( isset( $_chosen_attributes[ $taxonomy ] ) && in_array( $term->term_id, $_chosen_attributes[ $taxonomy ]['terms'] ) );
 
 					// skip the term for the current archive
 					if ( $current_term == $term->term_id ) {
@@ -396,7 +380,7 @@ class WC_Widget_Layered_Nav extends WC_Widget {
 			} // End display type conditional
 
 			$this->widget_end( $args );
-
+			
 			if ( ! $found ) {
 				ob_end_clean();
 			} else {