diff --git a/Push-buttons-and-button-caps.md b/Push-buttons-and-button-caps.md
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--- a/Push-buttons-and-button-caps.md
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@@ -1,5 +1,5 @@
 # Push-buttons
-The type of push-buttons used on the Portapack is SMD tactile switches of 6 mm per side and 7 mm of height. You can buy replacements here: https://a.aliexpress.com/_dZqx4vv 
+If the push-buttons are intermittently unresponsive, first make sure that the Portapack firmware is upgraded to version 1.7.1. or later, which improves handling of glitchy switch contacts.  The type of push-buttons used on the Portapack is SMD tactile switches of 6 mm per side and 7 mm of height. You can buy replacements here: https://a.aliexpress.com/_dZqx4vv 
 
 The easiest way to remove them is to clip the legs off, clean the pads carefully with solder wick and solder the new buttons.