diff --git a/console.go b/console.go
index afc88b7..3dc202b 100644
--- a/console.go
+++ b/console.go
@@ -33,8 +33,8 @@ type Console struct {
 	wrLock      sync.Mutex
 
 	writeMessage func(b *bytes.Buffer, l Level, scope string, caller string, m string)
-	writeKey     func(b *bytes.Buffer, s string)
-	writeValue   func(b *bytes.Buffer, s string)
+	writeKey     func(b *bytes.Buffer, k interface{})
+	writeValue   func(b *bytes.Buffer, v interface{})
 	writeScope   func(b *bytes.Buffer, scope string)
 	writeCaller  func(b *bytes.Buffer, caller string)
 }
@@ -126,17 +126,17 @@ func (c *Console) writeMessageColor(b *bytes.Buffer, l Level, scope string, call
 	b.WriteString(m)
 }
 
-func (c *Console) writeKeyColor(b *bytes.Buffer, s string) {
+func (c *Console) writeKeyColor(b *bytes.Buffer, k interface{}) {
 	b.WriteByte(32) // Space
 	c.setColor(b, "34")
-	b.WriteString(s)
+	fmt.Fprint(b, k)
 	c.resetColor(b)
 	b.WriteByte('=')
 }
 
-func (c *Console) writeValueColor(b *bytes.Buffer, s string) {
+func (c *Console) writeValueColor(b *bytes.Buffer, v interface{}) {
 	c.setColor(b, "36")
-	b.WriteString(s)
+	fmt.Fprint(b, v)
 	c.resetColor(b)
 }
 
@@ -153,15 +153,15 @@ func (c *Console) writeMessageSimple(b *bytes.Buffer, l Level, scope string, cal
 	b.WriteByte('"')
 }
 
-func (c *Console) writeKeySimple(b *bytes.Buffer, s string) {
+func (c *Console) writeKeySimple(b *bytes.Buffer, k interface{}) {
 	b.WriteByte(' ')
-	b.WriteString(s)
+	fmt.Fprint(b, k)
 	b.WriteByte('=')
 }
 
-func (c *Console) writeValueSimple(b *bytes.Buffer, s string) {
+func (c *Console) writeValueSimple(b *bytes.Buffer, v interface{}) {
 	b.WriteByte('"')
-	b.WriteString(s)
+	fmt.Fprint(b, v)
 	b.WriteByte('"')
 }
 
@@ -229,11 +229,11 @@ func (c *Console) writeBuf(buf *bytes.Buffer) {
 func (c *Console) writeValues(buf *bytes.Buffer, keysValues []interface{}) {
 	lenValues := len(keysValues)
 	for i := 0; i < lenValues; i++ {
-		c.writeKey(buf, fmt.Sprint(keysValues[i]))
+		c.writeKey(buf, keysValues[i])
 
 		i++
 		if i < lenValues {
-			c.writeValue(buf, fmt.Sprint(keysValues[i]))
+			c.writeValue(buf, keysValues[i])
 		} else {
 			c.writeValue(buf, "!VALUE")
 		}
diff --git a/core.go b/core.go
index df78c2d..1e774e1 100644
--- a/core.go
+++ b/core.go
@@ -93,96 +93,6 @@ func (c *core) printv1(l Level, s string, skip int, message string, keysValues [
 	}
 }
 
-// // func (c *core) print2(l Level, s string, messages ...interface{}) {
-// // 	t := fmt.Sprint(messages...)
-
-// // 	caller := ""
-// // 	if c.writers[0].caller || c.writers[1].caller {
-// // 		caller = c.getCaller()
-// // 	}
-
-// // 	stack := ""
-// // 	if c.writers[0].stack(l, s) || c.writers[1].stack(l, s) {
-// // 		stack = c.getStack()
-// // 	}
-
-// // 	w := c.writers[0]
-// // 	if w.isEnable(l, s) {
-// // 		c1 := ""
-// // 		s1 := ""
-
-// // 		if w.caller {
-// // 			c1 = caller
-// // 		}
-
-// // 		if w.caller {
-// // 			s1 = stack
-// // 		}
-
-// // 		w.Print(l, s, c1, s1, t)
-// // 	}
-
-// // 	w = c.writers[1]
-// // 	if w.isEnable(l, s) {
-// // 		if w.caller {
-// // 			w.Print(l, s, caller, stack, t)
-// // 		} else {
-// // 			w.Print(l, s, "", stack, t)
-// // 		}
-// // 	}
-// // }
-
-// // func (c *core) printf2(l Level, s string, format string, args []interface{}) {
-// // 	message := fmt.Sprintf(format, args...)
-// // 	caller := ""
-// // 	if c.writers[0].caller || c.writers[1].caller {
-// // 		caller = c.getCaller()
-// // 	}
-
-// // 	w := c.writers[0]
-// // 	if w.isEnable(l, s) {
-// // 		if w.caller {
-// // 			w.Print(l, s, caller, message)
-// // 		} else {
-// // 			w.Print(l, s, "", message)
-// // 		}
-// // 	}
-
-// // 	w = c.writers[1]
-// // 	if w.isEnable(l, s) {
-// // 		if w.caller {
-// // 			w.Print(l, s, caller, message)
-// // 		} else {
-// // 			w.Print(l, s, "", message)
-// // 		}
-// // 	}
-// // }
-
-// func (c *core) printv2(l Level, s string, message string, keysValues []interface{}) {
-// 	w := c.writers[0]
-// 	caller := ""
-// 	if c.writers[0].caller || c.writers[1].caller {
-// 		caller = c.getCaller()
-// 	}
-
-// 	if w.isEnable(l, s) {
-// 		if w.caller {
-// 			w.Printv(l, s, caller, message, keysValues)
-// 		} else {
-// 			w.Printv(l, s, "", message, keysValues)
-// 		}
-// 	}
-
-// 	w = c.writers[1]
-// 	if w.isEnable(l, s) {
-// 		if w.caller {
-// 			w.Printv(l, s, caller, message, keysValues)
-// 		} else {
-// 			w.Printv(l, s, "", message, keysValues)
-// 		}
-// 	}
-// }
-
 func (c *core) printAll(l Level, s string, skip int, messages []interface{}) {
 	caller := ""
 	var stack []string