+    error ReturnDustFail();
+
		 function _returnDust() private {
				 uint256 _remainingETH = remainingETH;
+        bool success;
				 assembly {
						 if gt(_remainingETH, 0) {
-                let callStatus := call(
+                success := call(
										 gas(),
										 caller(),
										 selfbalance(),
										 0,
										 0,
										 0,
										 0
								 )
						 }
				 }
+        if (!success) revert ReturnDustFail();
		 }
