diff --git a/workbook.go b/workbook.go
index fd8f82d..84e4775 100644
--- a/workbook.go
+++ b/workbook.go
@@ -3,8 +3,6 @@ package xls
 import (
 	"bytes"
 	"encoding/binary"
-	"encoding/hex"
-	"fmt"
 	"golang.org/x/text/encoding/charmap"
 	"io"
 	"os"
@@ -76,7 +74,6 @@ func (w *WorkBook) addFormat(format *Format) {
 }
 
 func (wb *WorkBook) parseBof(buf io.ReadSeeker, b *bof, pre *bof, offset_pre int) (after *bof, after_using *bof, offset int) {
-	fmt.Printf("BOF: %x %d ", b.Id, b.Size)
 	after = b
 	after_using = pre
 	var bts = make([]byte, b.Size)
@@ -108,27 +105,8 @@ func (wb *WorkBook) parseBof(buf io.ReadSeeker, b *bof, pre *bof, offset_pre int
 			}
 			for err == nil && offset_pre < len(wb.sst) {
 				var str string
-				//if size > 0 {
-				pos2, _ := buf_item.Seek(0, io.SeekCurrent)
-				fmt.Printf("Pos: %x: seek: %x: ReadCONT %xh bytes into %d (%s). pre.Size: %d",
-					wb.pos, pos2, size, offset_pre, wb.sst[offset_pre], pre.Size)
-				fmt.Printf(" GetStr,size=%d ", size)
 				str, err = wb.get_string(buf_item, size)
-				if len(str) > 30 {
-					fmt.Printf(" +strhex %s", hex.Dump([]byte(str)))
-				} else {
-					fmt.Printf(" +str %s", str)
-				}
-				if err == io.EOF {
-					fmt.Printf(" eof ")
-				}
 				wb.sst[offset_pre] = wb.sst[offset_pre] + str
-				fmt.Println()
-				//}else{
-				//	err = nil
-				//	fmt.Printf(" Add none (0-size): %d ",offset_pre)
-				//	fmt.Println()
-				//}
 
 				if err == io.EOF {
 					break
@@ -142,7 +120,6 @@ func (wb *WorkBook) parseBof(buf io.ReadSeeker, b *bof, pre *bof, offset_pre int
 		offset = offset_pre
 		after = pre
 		after_using = b
-		fmt.Println()
 	case 0xfc: // SST
 		info := new(SstInfo)
 		binary.Read(buf_item, binary.LittleEndian, info)
@@ -158,14 +135,8 @@ func (wb *WorkBook) parseBof(buf io.ReadSeeker, b *bof, pre *bof, offset_pre int
 			wb.pos += unsafe.Sizeof(size)
 			if err == nil {
 				var str string
-				fmt.Printf("ReadSST into %d/%d (%s)", i, info.Count, wb.sst[i])
 				str, err = wb.get_string(buf_item, size)
-				fmt.Printf(" +str %s", str)
-				if err == io.EOF {
-					fmt.Printf(" eof ")
-				}
 				wb.sst[i] = wb.sst[i] + str
-				fmt.Println()
 			}
 
 			if err == io.EOF {
@@ -224,7 +195,6 @@ func (w *WorkBook) get_string(buf io.ReadSeeker, size uint16) (res string, err e
 		var richtext_num = uint16(0)
 		var phonetic_size = uint32(0)
 		var flag byte
-		fmt.Printf(" flag: %x ", flag)
 		err = binary.Read(buf, binary.LittleEndian, &flag)
 		w.pos += unsafe.Sizeof(flag)
 		if flag&0x8 != 0 {
@@ -253,9 +223,6 @@ func (w *WorkBook) get_string(buf io.ReadSeeker, size uint16) (res string, err e
 			var runes []rune
 			if err == io.EOF {
 				i = i - 1
-				fmt.Printf(" [runesEOF, %d, %d] ", i, size)
-			} else {
-				fmt.Printf(" [runes. %d, %d] ", i, size)
 			}
 			runes = utf16.Decode(bts[:i])