diff --git a/script.js b/script.js
index 27a177c..432e157 100644
--- a/script.js
+++ b/script.js
@@ -31,7 +31,6 @@ function displayEval() {
         result = calc.calculate(mainScreen.textContent);
     } else {
         topScreen.textContent += mainScreen.textContent;
-        console.log("main: " + mainScreen.textContent);
         result = calc.calculate(topScreen.textContent);
     }
 
@@ -46,7 +45,6 @@ function displayOperator() {
     let operator = this.textContent;
 
     if (operator == "-" && (isNaN(mainScreen.textContent) || mainScreen.textContent == "0")) {
-        console.log("Entering changeSign");
         changeSign();
         return;
     }
@@ -89,11 +87,10 @@ function clear() {
         topScreen.textContent = "";
 
     } else if (this.classList.contains("error") && mainScreen.textContent !== "0") {
-            mainScreen.textContent = mainScreen.textContent.trimEnd()
-            mainScreen.textContent = mainScreen.textContent.slice(0, -1);
-
-            if (!isNaN(mainScreen.textContent.charAt(-2))) {
-                 mainScreen.textContent = mainScreen.textContent.trimEnd()
+            if (/^[0-9.]+$/.test(mainScreen.textContent)) {
+                mainScreen.textContent = mainScreen.textContent.slice(0, -1);
+            } else {
+                mainScreen.textContent = "";
             }
 
             if (mainScreen.textContent === "") {
@@ -107,16 +104,12 @@ function changeSign() {
     let num = mainScreen.textContent;
 
     if (num === "0") {
-        // Replace 0 with the negative sign
         mainScreen.textContent = "-";
     } else if (num === "-") {
-        // If already negative, reset to 0
         mainScreen.textContent = "0";
     } else if (num.startsWith("-")) {
-        // If the number is negative, remove the negative sign
         mainScreen.textContent = num.substring(1);
     } else {
-        // Toggle the sign for positive numbers
         mainScreen.textContent = `-${num}`;
     }
 }
@@ -163,7 +156,6 @@ function divideDecimals(a, b) {
 
 
 function Calculator(str) {
-    console.log("Calculator has been called")
     isEval = true;
     
     this.methods = {