diff --git a/DNS-manual-mode.md b/DNS-manual-mode.md
index 780f529..4eb25ce 100644
--- a/DNS-manual-mode.md
+++ b/DNS-manual-mode.md
@@ -28,21 +28,26 @@ acme.sh --issue -d example.com --dns \
 acme.sh --renew -d example.com \
   --yes-I-know-dns-manual-mode-enough-go-ahead-please
 
+```
+```sh
+if your DNS _acme challange fails when using renew CA will generate new _acme challenge, make sure to wait 1 min for dns entries to reflect before using renew.
+
 ```
 
 ```sh
 if you had issued an ECC CSR then use the --ecc switch.
-acme.sh --issue -d example.com -d *.example.com --dns \
+acme.sh --renew -d example.com -d *.example.com --dns \
  --yes-I-know-dns-manual-mode-enough-go-ahead-please --ecc
 
 ```
 
 ```sh
 if you had issued a Stagging Certificate with ECC/SHA CSR then use the --force switch to overwrite any entries of old CER and issue fresh CER.
-acme.sh --issue -d example.com -d *.example.com --dns \
+acme.sh --renew-d example.com -d *.example.com --dns \
  --yes-I-know-dns-manual-mode-enough-go-ahead-please --force
 
 ```
 
+
 ### Known issues:
 [The supported validation types are: dns-01 , but you specified: http-01](https://github.com/Neilpang/acme.sh/issues/1433)
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