>>2297 (OP)
Generally they just fade away without energy, however if in the course of your meditations, works, dreams, you encounter the tulpa and find it altered in nature or appearance since original programming then refocusing on it can reform/reshape it pretty rapidly in my experience. Something that helped me maintain my thoughtforms in my mind palace (in pic rel called wonderland) was a mini sun/moon in co-orbit in the court yard.
If some how you are leaking energy or are unconscious then you just need to up your meditation discipline game and do more awareness exercises to recall your power. When you feel it tugging somewhere or in some direction then you can know more assuredly what's really going on and where you need to patch your field/psychic habits.
Though if you put any less than 50 hours of mediation in originally I wouldn't worry about it unless something comes up or you put a lot of emotion or especially sexual energy into it then you should be extra vigorous to sweep/comb through your field, and maybe further summon any kind of thing that would/could respond to you that is in your field, and if nothing responds then you can declare dominion, then sanctuary in your field, followed by an order to 'all energy and emanations of mine' effectively reformatting or dissolving any errant servitors that may be lingering. EZ mode would just be to pray to a Bodhisattva about it.