Almost instant window smoke from Spawn 6 (left-side stairs, second row of spawns from back wall, in front of garbage bags)

Line up during the freezetime and hold down shift + left mouse button. When the round starts, tap D to align with the first thick metal bar, or fourth in total (use A if necessary to fix the alignment). Tap W and jumpthrow.

Don't forget to do everything holding down shift.

See instant window smokes from other spawns (by sausagegirljadzia):

• Spawn 1 [64-tick] [128-tick]
• Spawn 2 [64-tick] [128-tick]
• Spawn 3 [64-tick + 128-tick]
• Spawn 4 [64-tick] [128-tick]
• Spawn 5 [64-tick] [128-tick]
• Spawn 6 [64-tick] [128-tick]
• Spawn 7 [64-tick] [128-tick]
• Spawn 8 [64-tick] [128-tick]
• Spawn 9 [64-tick] [128-tick]

Additionally here's another fast way to smoke window on both tickrates.