diff --git a/math/distribution/NormalN.h b/math/distribution/NormalN.h
index b30c4d9..5075dea 100644
--- a/math/distribution/NormalN.h
+++ b/math/distribution/NormalN.h
@@ -93,11 +93,6 @@ namespace Distribution {
                 const Eigen::MatrixXd centered = data.rowwise() - mean.transpose();
                 Eigen::MatrixXd cov = (centered.adjoint() * centered) / double(data.rows() - 1);
 
-                //this is a hack
-                if(cov(2,2) < 0.1){
-                    cov(2,2) = 0.1;
-                }
-
                 return NormalDistributionN(mean, cov);
         }
 
diff --git a/math/divergence/KullbackLeibler.h b/math/divergence/KullbackLeibler.h
index 27124e7..630e5d2 100644
--- a/math/divergence/KullbackLeibler.h
+++ b/math/divergence/KullbackLeibler.h
@@ -56,8 +56,8 @@ namespace Divergence {
 
                         // calc PQratio
                         if(Q[i] == 0.0){
-                            //Assert::doThrow("Division by zero is not allowed ;).");
-                            PQratio = P[i] / 0.00001;
+                            Assert::doThrow("Division by zero is not allowed ;).");
+                            //PQratio = P[i] / 0.00001;
                         } else {
                             PQratio = P[i] / Q[i];
                         }
diff --git a/sensors/radio/WiFiQualityAnalyzer.h b/sensors/radio/WiFiQualityAnalyzer.h
index 994b2ec..0d09430 100644
--- a/sensors/radio/WiFiQualityAnalyzer.h
+++ b/sensors/radio/WiFiQualityAnalyzer.h
@@ -68,8 +68,8 @@ private:
 		const float stdDev = std::sqrt(avg2 - avg*avg);
 
 		// avg rssi score
-		const float minRSSI = -90;
-		const float maxRSSI = -65;
+        const float minRSSI = -90;
+        const float maxRSSI = -75;
 		float score1 = (avg-minRSSI) / (maxRSSI-minRSSI);	// min = 0; max = 1
 		if (score1 > 1) {score1 = 1;}
 		if (score1 < 0) {score1 = 0;}