diff --git a/.buildkite/pipeline.cleanamis.yaml b/.buildkite/pipeline.cleanamis.yaml
index a441ff0f5..4d8c174b3 100644
--- a/.buildkite/pipeline.cleanamis.yaml
+++ b/.buildkite/pipeline.cleanamis.yaml
@@ -6,10 +6,28 @@ steps:
     env:
       DRY_RUN: true
       AWS_REGION: "{{matrix}}"
+    # list of regions should match .buildkite/steps/copy.sh
     matrix:
       - "us-east-1"
+      - "us-east-2"
+      - "us-west-1"
       - "us-west-2"
+      - "af-south-1"
+      - "ap-east-1"
+      - "ap-south-1"
+      - "ap-northeast-2"
+      - "ap-northeast-1"
       - "ap-southeast-2"
+      - "ap-southeast-1"
+      - "ca-central-1"
+      - "eu-central-1"
+      - "eu-west-1"
+      - "eu-west-2"
+      - "eu-south-1"
+      - "eu-west-3"
+      - "eu-north-1"
+      - "me-south-1"
+      - "sa-east-1"
     plugins:
       - aws-assume-role-with-web-identity#v1.1.0:
           role-arn: arn:aws:iam::172840064832:role/pipeline-buildkite-elastic-stack-for-aws-ami-cleaner
diff --git a/.buildkite/steps/copy.sh b/.buildkite/steps/copy.sh
index 348c952e7..281fc2c70 100755
--- a/.buildkite/steps/copy.sh
+++ b/.buildkite/steps/copy.sh
@@ -77,6 +77,8 @@ if [[ -z "${BUILDKITE_AWS_STACK_BUCKET}" ]]; then
   exit 1
 fi
 
+# to ensure old images are garbage collected, the list of regions should
+# match .buildkite/pipeline.cleanamis.yaml
 ALL_REGIONS=(
   us-east-1
   us-east-2