Battery original glue super hard to remove
Hello guys, first... I replaced an iPhone 5s battery before already, and it went well, but I need to heat the back of the phone to remove the adhesives because they were so hard to remove when I was pulling them so the broke... My question is, what can I do beside heating the back of phone to change the batteries on iPhones with adhesives in a friendly way? because I have so many costumers with those phones and it takes like 30 minutes to complete the replacement and actually I have a feeling that it can go wrong and I can break something(it happened to me already on an iPhone 5c).
On the other hand, I can't believe is so easy to replace batteries on the iphone 4, 4s and 5, because they have no adhesives like newer models. They take just 15 minutes to complete the replacement.
Will be better to heat the back of the phone before pulling the strips?