Dear friend
I am happy that you are so frank in admitting that you were regular in your nitya krmanshtanams like Sandhyavandana but oflate not that regular because of laziness. Don't worry, this is a phase several of our community people might have undergone at one time or other. But our Samskarams (panpaadu) and total faith in HIM surely make us to come back on track. In your case too, this is only a temporary phase and you will certainly be regular soon in performing Sandhyavandanadhi karmas to your entire satisfaction.
Guruvarulum Tiruvarulum elaarukkum kidaikkattum
Sarma Sastrigal