Drotské said the Cheetahs were made aware before the match that discipline would be vital but his side still fell prey to ill-discipline.
"It's something (discipline) that we knew would be vital," said Drotské. "It was a match that we could have won but we gave away dumb penalties.
"There were two or three (penalties) that were unnecessary, and those came at crucial times."
Drotské said that for the second successive week his side could have won the match but his players will draw great courage from brave performances against Super Rugby's No 1 team (Bulls) and No 2 team (Stormers).
The intense Cape Town summer heat also contributed to dour fare dished up at Newlands where the match ended tryless.
Drotské, Allister Coetzee (Stormers coach) and Jean de Villiers (Stormers captain) all spoke about the slippery ball as a result of the humid conditions, which also caused sweaty palms.
"The heat played a role as it detracted from the intensity of the players," said Drotské. "The ball became slippery and sometimes difficult to hold on to."
Coetzee said that the players were professionals and should have had the ability to adapt to the conditions.
"This performance was not good enough and they players admitted it afterwards in the dressing room," said Coetzee.
"The ball was quite sticky during the match.
"While we need to fix a few things (in our playing style), we're glad to be winning. But is shows that there's a lot of work to be done."
De Villiers said his side battled to gain momentum in the match and warned that the season would be far tougher ahead.