CALayer memory leak - ios

Question

Hoping someone can help me here because I'm losing the will to live with this memory issue.
When I push a particular view controller, Instruments shows a growth of around 3MB with the majority coming from CALayer objects belonging to each control I have on the view controller (mostly textfields and labels).
When I pop this view controller these CALayer allocations remain in memory, in fact every time I push and pop the controller I get a growth of 3MB each time.
So my question is how do I remove these from memory, is there something I need to be doing when deallocating the controller? The only reference in my code to the controls' layer is to create rounded corners and a border width (layer.cornerRadius = 10) but I still get the growth even when I comment this out.
The controller contains a tableview where each cell contains 3 textfields, 2 buttons and an imageview which are created programatically.
-(UIButton*) formatButton:(UIButton*)button
{
button.layer.cornerRadius = 10;
button.clipsToBounds = YES;
button.layer.borderColor=[[UIColor lightGrayColor] CGColor];
button.layer.borderWidth=1.0;
[button.titleLabel setTextAlignment:NSTextAlignmentCenter];
[button.titleLabel setFont:[UIFont fontWithName:#"HelveticaNeue-UltraLight" size:20]];
[button setTitle:#"0" forState:UIControlStateNormal];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
return button;
}
-(UITextField*)formatTextField:(UITextField*)textField
{
[textField setFont:[UIFont fontWithName:#"HelveticaNeue-UltraLight" size:20]];
textField.backgroundColor=[UIColor whiteColor];
textField.layer.borderColor=[[UIColor lightGrayColor] CGColor];
textField.layer.cornerRadius = 10;
textField.layer.borderWidth=1.0;
[textField setTextAlignment:NSTextAlignmentCenter];
textField.clipsToBounds=YES;
textField.text=#"";
textField.enabled=NO;
return textField;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"ItemCellID" forIndexPath:indexPath];
// Configure the cell...
OrderedProduct *orderedProduct=self.orderedProductsArray[indexPath.row];
//NSLog (#"ordered Product %#",orderedProduct.productID);
UITextField *qualityField=[[UITextField alloc] initWithFrame:CGRectMake(113,23,324,30)];
qualityField=[self formatTextField:qualityField];
[cell addSubview:qualityField];
UITextField *sizeField=[[UITextField alloc] initWithFrame:CGRectMake(445, 24, 142, 30)];
sizeField=[self formatTextField:sizeField];
[cell addSubview:sizeField];
UITextField *totalPriceField=[[UITextField alloc] initWithFrame:CGRectMake(786,24,137,30)];
totalPriceField=[self formatTextField:totalPriceField];
[cell addSubview:totalPriceField];
UIButton *quantityButton=[[UIButton alloc] initWithFrame:CGRectMake(595,24,60,30)];
quantityButton=[self formatButton:quantityButton];
[cell addSubview:quantityButton];
UIButton *priceButton=[[UIButton alloc] initWithFrame:CGRectMake(663,24,119,30)];
priceButton=[self formatButton:priceButton];
[cell addSubview:priceButton];
UIImageView *imageView=[[UIImageView alloc] initWithFrame:CGRectMake(5,15,100,50)];
[cell addSubview:imageView];
UIButton *removeButton=(UIButton*)[cell viewWithTag:kRemoveButton];
if (self.selectedOrder.status==[NSNumber numberWithInt:kOrderStatusProvisional])
{
quantityButton.enabled=YES;
quantityButton.backgroundColor=[Settings getInstance].enabledButtonColor;
[quantityButton addTarget:self action:#selector(quantityButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
priceButton.enabled=YES;
priceButton.backgroundColor=[Settings getInstance].enabledButtonColor;
removeButton.hidden=NO;
[removeButton addTarget:self action:#selector(removeButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
}
else
{
quantityButton.enabled=NO;
quantityButton.backgroundColor=[Settings getInstance].disabledButtonColor;
priceButton.enabled=NO;
priceButton.backgroundColor=[Settings getInstance].disabledButtonColor;
removeButton.hidden=YES;
}
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setCurrencyCode:#"GBP"];
[numberFormatter setNumberStyle: NSNumberFormatterCurrencyStyle];
imageView.image=[self.imageCache objectForKey:orderedProduct.product.productImageName];
UITapGestureRecognizer *tgr=[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(imageViewTapped:)];
imageView.userInteractionEnabled=YES;
[imageView addGestureRecognizer:tgr];
qualityField.text=orderedProduct.product.name;
sizeField.text=orderedProduct.product.productSize.productSize;
quantityButton.titleLabel.text=[NSString stringWithFormat:#"%#",orderedProduct.quantity];
[quantityButton setTitle:[NSString stringWithFormat:#"%#",orderedProduct.quantity] forState:UIControlStateNormal];
float price=[orderedProduct.price integerValue]/100; // server price is in pennies
float totalPrice=price*[orderedProduct.quantity integerValue];
[priceButton setTitle:[numberFormatter stringFromNumber:[NSNumber numberWithFloat:price]] forState:UIControlStateNormal];
totalPriceField.text=[numberFormatter stringFromNumber:[NSNumber numberWithFloat:totalPrice]];
return cell;
}
Not able to post images yet so below is a crude description of what Instruments is saying,
Snapshot Growth
Generation B 3.64MB
VM: UILabel (CALayer) 964KB
VM: UITextFieldLabel (CALayer) 792KB
VM: CoreAnimation 788KB