To be honest with PLA and a glass heated bed you should not need any blue tape at all, if anything you are making it less likely to stick. Just rub some PVA glue on the glass in a thin even layer, or use one of the many sprays you can get like 3D Lac what i personally use.
Long as you have got your bed level right and first layer settings right, you will not have any problems at all.
If there any reason why you have picked to put blue tape on the glass?
When using blue tape we do not use heat bed, cause the glue on the tape will not stick at high temperature.
Just turn of the heat bed and it will be fine.
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