diff --git a/respodns/ip_info.py b/respodns/ip_info.py
index 365a2a8..b22af89 100644
--- a/respodns/ip_info.py
+++ b/respodns/ip_info.py
@@ -72,7 +72,6 @@ class IpInfoByIpApi(IpInfoBase):
 
         if x_remaining == 0:
             self.cooldown = time() + x_cooldown
-            self.cooldown += 1.0  # still too frequent according to them
 
         return None  # no error
 
@@ -85,7 +84,8 @@ class IpInfoByIpApi(IpInfoBase):
         # for the duration of X-Ttl in seconds.
         while time() < self.cooldown:
             wait = self.cooldown - time()
-            wait = max(wait, 0.1)  # wait at least a little bit
+            wait = max(0, wait)  # must not be negative!
+            wait += 0.1  # still too frequent according to them
             await sleep(wait)
 
     async def http_lookup(self, ip):