diff --git a/Element-picker.md b/Element-picker.md
index 9a429b7..5d201e1 100644
--- a/Element-picker.md
+++ b/Element-picker.md
@@ -23,6 +23,8 @@ The removed element reappear when you reload the page?
 There may be many different reasons for this.
 
 - The URL or selector for the blocked element has a variable part in it, which changes each time a page is loaded.
+    - If this is a network filter, you will have to manually edit the filter to make use of wildcards for the parts of the URL which are variable.
+    - If this is a cosmetic filter, you may have to manually craft a better CSS selector. Sometimes this requires observing the surrounding DOM data.
 - Cosmetic filters are disable for the site. There are many ways to disable cosmetic filtering:
     - The [per-site cosmetic filtering switch](https://github.com/gorhill/uBlock/wiki/Quick-guide:-popup-user-interface#no-cosmetic-filtering).
     - The option _"Parse and enforce cosmetic filters"_ is un-checked in the _"3rd-party filters"_ pane in the dashboard.