TC reported TIMS indicated smoke internal at Front DT car. Staff (BSH) checked and confirmed - no he at or smoke was present. ~~~~~ 3564 TC reported TIMS indicated smoke internal. Staff (BSH) confirmed no heat or smoke was present. CE : 3564 smoke internal alarm reset ok n fault cleared.  3564 FC 720. Checked 3564 no.2 end smoke detector no abnormalities, no accumulation of dust, dirt and water stain in the duct. Preventively swapped SDR2 with 1564. Ops20 raised to check smoke detector.  Aliff/Redzwan 45196 BSD: To check 3564 no2 end smoke detector Checked 3564 no.2 smoke internal detector not very dusty. Serviced and cleaned the smoke internal FSD with compressed air. Function checked ok. Done by: Ngieng, Morgan, Kumar 45201