Can you tell me how to avoid doing the qalqalah on the ta and kaf when they are saakin.

Question
Assalaamu alaykum

Can you help me please. Can you tell me how to avoid doing the qalqalah on the ta and kaf when they are saakin.

Jazak Allahu Khayran for all your help

Answer
Wa alaikum assalaam wa rahmatullahi wa barakaatuh
The kaaf and ta' are the two letters which have the characteristic of shiddah plus hams.   The characteristic of shiddah is found in all the qalqalah letters, so this is the reason one may have the tendency to erroneously make a qalqalah on them when they are saakinah.  
Since both these letters have hams too, one has to close off the articulation point completely when they are saakinah, then after that release the air (hams).  The characteristic of hams (running of air) is what prevents them from having a qalqalah.  The only time in reading the Qur'an when we do not apply all the characteristics at the same time is with the kaaf and ta' saakinah; as stated we first apply the shiddah by closing off the articulation point completely, then after that let the air run by allowing some space in the articulation point for the air to run. 
Wa iyyaaakum.