blackie cant stand the scorching heat

i predict that in the very near future, i wld have to change about 50% of my yq's strings.. cos they keep breaking due to high tension.. Usually my tuning only occurs in one direction, i.e. i always have to tune them higher cos the pitch keeps going down, perhaps due to the heat in my room.. Another of my bass string broke today while i was practicing.. and it's supposed to be one of the more difficult to break ones

And i wonder why on average i've to change the rubber for the sticks every 5 days, even when i'm already using the thickest rubber available. Hmm it's suppose to last at least 2-4 wks, plus i dont practice every hr of the day.. it's just perplexing. Those normal rubbers are even worse, it could only last about 2-3 days for me. Plus I just realized that the cost of these rubbers have doubled when i went to bras basah this afternoon and so i ended up buying none.. gosh it's getting expensive to maintain the inst.!