Helloween guitarist Roland Grapow said about Schwichtenberg in an interview 1999: I would see him and he would go from one day to another like totally crazy, because of a nervous breakdown.

[2]The song "Step Out of Hell" from the Helloween album Chameleon is written by Roland Grapow about Schwichtenberg's problems with drug abuse.

After a six-hour telephone call with Michael Weikath, in which he explained why they had made that hard and painful decision, Ingo was asked to leave Helloween after the album Chameleon.

Schwichtenberg was apparently somewhat dissatisfied with the direction of the band as well, even going as far as to refer to their song from the Chameleon album "Windmill", as "Shitmill".

After Helloween, Schwichtenberg's father had died in February 1995, and he slid further and further into his schizophrenic episodes, culminating in his suicide on 8 March 1995 by jumping in front of an S-train in his native hometown Hamburg.