-
I’ve run into the same pattern and never found a clean switch for it. The only things that moved the needle for me were indirect signals. Time of day and geo tweaks sometimes help since a lot of the junk Android traffic clusters oddly there. Also tightening match types and query intent reduced mobile spam more than expected, even though it sounds unrelated. Past that, device bid adjustments plus aggressive search term pruning was the least bad combo. Without offline signals or post click filters, it’s mostly damage control rather than true suppression.
